All tools

Stamp your logo or an image watermark on PDF pages — choose position, size, transparency and which pages.

Number the pages of a PDF — choose position, format (1, Page 1 of 10), starting number, font size and which pages. Runs in your browser.

Compare two PDFs (or Word files) and see exactly what text was added, removed or changed — page by page, highlighted like a redline.

Shrink a PDF for email or upload. Pick light (keeps text selectable) or stronger image-based compression.

Trim the margins of PDF pages — set how much to cut from each side, on all pages or a selection — to remove white space or scanner borders.

Click the pages you don't want and download the PDF without them. Everything stays on your device.

Automatically straighten crooked scanned pages and whiten the paper background — fix tilted scans, remove gray noise and shrink the file with grayscale. Runs in your browser.

Add text, white-out boxes, highlights, rectangles and form fields to PDF pages — click to place, drag to move — then download.

Send a PDF for signature to several people: place signature boxes for each signer, then everyone signs in turn in their browser. When the last person signs, a signing certificate with an audit trail and SHA-256 fingerprints is added. No account, nothing uploaded.

Save every picture embedded in a PDF as PNG or JPG files — at their original resolution — downloaded together as a ZIP.

Fill in PDF forms online — text fields, checkboxes, dropdowns and radio buttons are listed for you to complete — then save or flatten the result.

Flatten a filled PDF form so the answers become part of the page and can't be edited — ready to email, print or archive.

Add photos, scans or diagrams to an existing PDF as new pages, placed exactly where you want them.

Check your book's interior PDF against Amazon KDP paperback rules before uploading — trim size, bleed, page count, gutter and outside margins, embedded fonts — and get your cover's spine width.

Join several PDFs into a single document in the order you choose. Files never leave your device.

Recognize the text in scanned PDFs and create a searchable PDF you can select and copy from — or extract the text — in 100+ languages.

Rearrange PDF pages — move pages, rotate, duplicate or delete them — with thumbnails, then download the reorganized PDF.

Rearrange a PDF into booklet order — two pages per sheet side, ready to print double-sided, fold and staple — with blank pages added automatically.

Add clickable bookmarks (an outline / table of contents) to any PDF — nested chapters and sections, or auto-suggested from each page — so readers can jump around in any PDF viewer.

View and edit a PDF's hidden properties — title, author, subject, keywords, creator, producer and dates — or wipe them before sharing.

Count the pages in one or many PDFs at once — with page sizes, orientation and a total — handy for printing quotes and batch jobs.

Convert PDF to PDF/A-2b or PDF/A-3b for long-term archiving — adds XMP metadata and an sRGB color profile, removes JavaScript and other forbidden features, and checks fonts. Runs in your browser.

Extract the text from a PDF as plain text or Markdown — keeping lines and paragraphs, with headings detected — to copy, search or reuse.

Lock a PDF with a password using AES-256 encryption. The password and file never leave your browser.

Permanently black out sensitive text and images in a PDF — the redacted pages are re-rendered so the hidden content is truly gone.

Try to recover a damaged or corrupt PDF — rebuild its structure, or as a last resort re-render readable pages into a new PDF.

Turn every page, or just the ones you choose, by 90°, 180° or 270° and save the fixed PDF.

Use your phone or laptop camera to scan documents into a clean PDF — capture several pages, enhance for readability, reorder and save.

Sign a PDF in your browser — draw or type your signature (or upload an image), place it on any page, and download the signed PDF.

Break a PDF into separate files — every page on its own, by page ranges, or just the pages you pick.

Remove the password from a PDF you have access to — enter the password once and download a copy that opens without it.

Convert CSV to Excel (XLSX) and Excel to CSV, TSV or JSON in your browser — keeps accents intact, supports semicolon CSV for European Excel, and exports every sheet at once.

Prepare a Word document for Google Docs or sharing: accept all tracked changes, remove comments and their authors, strip embedded fonts and macros, and see which features (text boxes, SmartArt, equations) Google Docs may not convert well.

Convert DRM-free EPUB e-books to PDF in your browser — cover, chapters, headings, lists and images, with a choice of page size and text size for printing or reading on any device.

Turn .xlsx, .xls or .csv spreadsheets into printable PDF tables — every sheet, with headers repeated on each page.

Convert HTML to PDF in your browser — paste code or open an .html file, choose paper size, orientation and margins, and save a PDF with sharp, selectable text.

Combine JPG, PNG or other images into one PDF, with page size, orientation and margin options.

Pull tables out of a PDF into an .xlsx spreadsheet, with numbers kept as real numbers you can sum.

Turn every page of a PDF into a sharp JPG image at the resolution you need. Many pages download as a ZIP.

Turn PDF pages into a .pptx deck — as exact-looking picture slides, or as slides with editable text boxes.

Convert a PDF into an editable .docx with its paragraphs and headings rebuilt. Scanned pages come through as images.

Convert PowerPoint slides to PNG, JPG or WebP images — up to 4K, one slide or all of them as a ZIP. Runs in your browser; your presentation isn't uploaded.

Convert a .pptx deck into a PDF with one page per slide, keeping text boxes and pictures where you placed them.

Paste notes or open a .txt file and get a clean, readable PDF with your choice of page size and font size.

Drop any file — PDF, Word, Excel, PowerPoint, images, HEIC, video, audio, e-books, subtitles, data files — and see every way you can convert it, all in your browser.

Convert Word documents (.docx) to clean, semantic HTML — headings, lists, tables, links and images — ready to paste into a website or CMS. Preview, copy or download.

Convert a .docx document to PDF in your browser — headings, lists, tables and pictures carried over.

Extract plain text from Word documents, or turn plain text into a formatted .docx file with headings and bullet lists — free, instant and private.

Build Excel and Google Sheets formulas without memorizing syntax — SUMIF, COUNTIF, XLOOKUP, IF, date differences, TEXTJOIN, UNIQUE and more. Pick a task, fill in your cells, copy the formula.

Every common paper size — A0–A7, B, envelopes, US Letter, Legal, Tabloid and photo sizes — in millimeters, inches and pixels at 300 DPI.

Work out what printing really costs per page and per job — ink or toner, paper and double-sided savings — for home and office printers.

Check whether your files fit — attachment and upload limits for Gmail, Outlook, WhatsApp, Discord, Telegram, Slack and more, with how much you need to shrink.

Clean up a CSV file — trim spaces, remove empty rows and duplicate rows (or duplicates by one column), and fix ragged rows — all in your browser.

Combine two CSV files — stack rows (matching columns by header name) or join them on a shared key column like a VLOOKUP.

Split a large CSV into smaller chunks by number of rows — each part keeps the header row — for imports with row limits.

Personalize letters, emails or messages in bulk — write a template with {{placeholders}} and merge it with a CSV list of names and details.

Create a clean quote, estimate or purchase order with line items, tax, discount and totals — ready to copy into an email or document.

Generate structured meeting minutes — attendees, agenda, decisions and action items with owners and due dates — ready to paste into email or docs.

Make a printable sign-up sheet for volunteers, potlucks, classes or events — with your own columns and number of rows.

Build a properly formatted cover letter from your details — a strong opening, your top achievements, why this company, and a confident close.

Print mailing and address labels on Avery sheets — 5160, 5163, 5164, L7160 and more. Paste a list of addresses (mail merge) or fill a sheet with one label, then download a perfectly aligned PDF.

Rename many files at once — add numbering, dates, prefixes and suffixes, find and replace (with regex), change case or extension — preview every new name, then download as a ZIP or rename in place.

Make beautiful certificates of achievement, completion or appreciation — classic, elegant or modern designs with seal, signatures and logo. Create one or a whole class at once as a PDF.

Make bar, line, area, pie, doughnut, stacked and scatter charts from pasted data or a CSV/Excel file — customize titles and colors, then download a crisp PNG or SVG.

Open CSV, Excel and JSON files in your browser — search, sort and page through thousands of rows, see a summary of every column, and export to CSV, Excel or JSON. Nothing is uploaded.

Write or paste your chapters, add a cover and download a valid EPUB 3 e-book with a table of contents — ready for Apple Books, Kobo, Google Play Books and Amazon KDP.

Print return and recipient addresses directly on envelopes — #10, #9, A7, A2, DL, C5, C6 and more — with an optional logo and stamp box. Download a PDF sized exactly to the envelope.

Draw flowcharts, process maps, sequence diagrams, state machines, database ER diagrams and timelines from simple text — laid out automatically. Download PNG or SVG. Free, private, no sign-up.

Design a flyer or poster for events, sales, classes or services — bold, photo or minimal layouts, with optional tear-off contact tabs. Download a print-ready PDF or PNG.

Plan a project timeline with a free Gantt chart maker — add tasks, phases, dates and progress, see the timeline scale automatically by day, week or month, and download PNG or SVG.

Generate printable graph paper as a crisp PDF — square grid, dot grid, isometric, hexagon, lined, Cornell notes and music staff — with custom spacing, colors and paper size.

Create printable invitations for birthdays, weddings, baby showers, graduations and parties — elegant fonts, colors and decorations. Download a 5×7, 4×6 or A5 card as PDF or PNG.

Fill in the official IRS Form W-9 or 2026 Form W-4 with a simple form, then download the completed PDF to sign. Everything happens in your browser — your SSN never leaves your device.

Create a professional company letterhead with your logo, contact details and footer — then type a letter on it and download a polished PDF. Letter and A4.

Turn an indented list of ideas into a colorful mind map — balanced branches, curved links and one color per topic. Brainstorm, plan or study, then download PNG or SVG.

Create an organizational chart from a simple indented list of names and titles — clean automatic layout, colors by department and PNG/SVG download. Great for teams, schools and clubs.

Summarize spreadsheet data with a pivot table in your browser — group by rows and columns, sum, count, average, min or max, group dates by month, quarter or year, and export to Excel.

Print monthly calendars, weekly and daily planners, habit trackers and to-do lists — pick dates, colors and paper size and download a clean PDF. Make a whole year's calendar in one go.

Build a clean, ATS-friendly resume in minutes — pick a modern, classic or compact template, fill in your experience and download a PDF. Free, no sign-up, private.

Create a poll or short survey in a minute — single choice, multiple choice and text questions — share a link, and watch live results. No sign-up; data deletes itself.

Bundle files and folders into a single ZIP archive in your browser — keep folder structure, choose compression and download instantly. No upload, no size limit beyond your device's memory.

Open ZIP files in your browser — browse folders, preview text and images, and download single files or whole folders. Also opens DOCX, XLSX, EPUB and JAR contents. Nothing is uploaded.

Find the aspect ratio of any width and height (like 1920×1080 = 16:9), and calculate a new width or height that keeps the same proportions.

Convert pixels to inches, centimeters and millimeters at any DPI — and find the largest print size an image supports, or the pixels you need for a print.

Find the name of any color — enter a HEX code to get the closest CSS / HTML color name, with its RGB values and how close the match is.

Proven heading + body font pairings from free Google Fonts — with the mood each suits, from editorial and luxury to tech and kids.

Add text, a watermark or a date stamp to photos — choose font, size, color, position, opacity and a tiled watermark pattern.

Compare two photos with a draggable before/after slider — then export embeddable HTML, a snapshot image, or an animated GIF for social media. Great for edits, renovations and results.

Combine photos into a collage or grid, place two images side by side or stacked, or pack sprites into a sprite sheet — with spacing, background and size options.

Shrink JPG, PNG and WebP images — pick a quality, or set a target size like 100 KB for forms and job portals — and optionally resize at the same time.

Crop images freely or to exact ratios — 1:1, 4:5, 16:9, 9:16 — or as a circle for profile pictures. Drag to adjust and download instantly.

Put screenshots into phone, tablet, laptop, browser or monitor mockups — frame colors, landscape mode and gradient backgrounds — and download a transparent 2× PNG for marketing and portfolios.

See hidden photo metadata — camera, date taken and GPS location on a map — and remove it before posting. Lossless: the image itself isn't re-compressed.

Create a complete favicon set from one image — favicon.ico, PNG sizes, Apple touch icon, Android/PWA icons and the HTML tags to paste into your site.

Turn a set of images into an animated GIF — set the frame delay, size and looping — right in your browser.

Convert iPhone HEIC/HEIF photos to JPG or PNG in your browser — batch convert and download a ZIP. No upload, no app needed.

Click anywhere on an image to get the exact HEX and RGB color, and extract its dominant color palette — for designs, brands and websites.

Convert images between JPG, PNG, WebP and AVIF in bulk — PNG to JPG, WebP to PNG, JPG to WebP and more. Private: nothing is uploaded.

Set the DPI of JPG and PNG images to 300, 72 or any value — without changing the pixels — for print shops, publishers and application forms.

Check image dimensions, file size, format, aspect ratio, megapixels and DPI for one or many images at once — nothing is uploaded.

Split an image into a grid of tiles — 3×3 Instagram grids, seamless carousel slides, or large poster tiles to print on A4/Letter pages.

Turn any picture into ASCII text art — choose the width, character set and inversion — then copy it or download as a text file.

Convert images to Base64 data URIs for HTML, CSS and JSON — or paste Base64 to preview and download the image. Runs in your browser.

Convert PNG or JPG images to scalable SVG vectors in your browser — ideal for logos, icons, signatures and line art. Control colors, detail and smoothness, and remove the background.

Copy text out of photos, screenshots and scanned images — in English and 100+ languages — with OCR that runs in your browser.

Enlarge images 1.5× to 4× with high-quality Lanczos resampling and adjustable sharpening — smooth, crisp edges instead of blocky pixels. Compare before and after, download PNG, JPG or WebP.

Make memes from your own images — classic top and bottom text in bold Impact style, with adjustable size and outline. No watermark.

Browse and search the 100 most popular meme templates — Drake, Distracted Boyfriend, Two Buttons and more — with the number of text boxes each needs. Download a blank template or open it in our Meme Generator.

Crop a photo to official passport and visa sizes — US 2×2 in, UK/EU 35×45 mm, India, Canada, China and more — plus a printable 4×6 sheet.

Edit photos online — brightness, contrast, saturation, warmth, blur, sharpen, black & white, sepia, invert and vintage presets — then download.

Turn photos into pencil sketches or printable coloring pages — clean line art from edge detection, with adjustable detail and line thickness.

Draw pixel art on a grid — or convert a photo into pixel art or a cross-stitch pattern with a limited color palette — then export at any scale.

Hide faces, license plates, names or other private details — drag boxes over areas to blur, pixelate or black them out, or pixelate the whole image.

Create placeholder images in any size — custom colors and text, PNG, JPG, WebP or SVG — or copy an <img> tag with the image inlined. Batch-generate many sizes as a ZIP.

Make a polished profile picture — crop and zoom your photo in a circle or square, add a gradient ring and background, and download a crisp PNG for LinkedIn, Instagram, X or YouTube.

Turn a quote or headline into a shareable image — or a sized banner for YouTube, X, LinkedIn or Facebook — with backgrounds, fonts and your handle.

Remove the background from photos automatically with AI — people, products, pets, cars. Download a transparent PNG, or swap in a color, blur or your own image. Runs on your device; nothing is uploaded.

Paint over unwanted things in a photo — scratches, dust, blemishes, date stamps, text or small objects — and fill them in from the surroundings. Undo anytime; runs on your device.

Resize one photo or a whole batch by pixels or percentage, keeping the aspect ratio. Nothing is uploaded.

Search by image across Google Lens, Bing, TinEye and Yandex in one place — paste an image link or copy your photo — to find its source, similar images or fake profiles.

Rotate images 90°, 180° or 270°, or flip them horizontally or vertically — one photo or a whole batch, with no quality loss for PNG.

Make screenshots and product shots look polished — gradient background, padding, rounded corners, drop shadow and a browser window frame.

Create a transparent PNG signature — draw it with your mouse or finger, or type your name in a handwriting font — for documents and emails.

Create round, oval or rectangular rubber-stamp graphics — curved text, center text, date, stars and a worn-ink texture — and download a transparent PNG or SVG. APPROVED, PAID, DRAFT and more.

Convert SVG vector files to PNG or JPG at any size — crisp at 1×, 2× or 4× — with transparent or colored backgrounds.

Put your design on a t-shirt, long-sleeve or tote bag mockup — pick the garment color, size and position the artwork, and download a 2000×2000 PNG for your store or social posts.

Click a color to make it transparent — perfect for logos and product shots on plain backgrounds — or replace it with another color. Adjustable tolerance.

Resize and crop any image to fit your phone or desktop exactly — iPhone, Android, 1080p, 1440p, 4K, ultrawide — without stretching.

Estimate a video or audio file's size from bitrate and duration — or find the bitrate you need to hit a target size (e.g. under 25 MB for Discord or email).

Standard video resolutions (720p to 8K) and the right size, aspect ratio and bitrate for YouTube, TikTok, Instagram Reels, Shorts and more.

Convert subtitles between SRT and WebVTT formats — fix timestamps, renumber cues and download a file ready for YouTube, HTML5 video or your editor.

Fix out-of-sync subtitles — shift every SRT or VTT timestamp earlier or later by any number of seconds, or stretch timing to fix drift.

Format and validate YouTube chapter timestamps for your video description — checks the rules (start at 0:00, at least 3 chapters, 10 seconds each).

See the notes in any chord — major, minor, 7th, maj7, sus, dim, aug, 9ths and more — with correct spelling and intervals, for guitar, piano and ukulele.

Find the notes of any scale — major, minor, pentatonic, blues and all modes — plus the chords in the key with Roman numerals.

Create a valid podcast RSS feed with Apple Podcasts and Spotify tags — show details, artwork, category and an episode list — ready to host alongside your audio files.

Turn your episode details into polished show notes — summary, guest bio, key takeaways, timestamps (chapters) and links — formatted for Spotify, Apple, YouTube descriptions or your blog.

Put a soundtrack on your video — replace the original sound or mix music underneath it, with volume controls and an automatic fade-out.

Convert audio to MP3 or WAV — M4A, OGG, FLAC, WAV, AAC — and extract MP3 audio from MP4, MOV and WebM videos. Batch convert in your browser.

Cut and trim audio online — drag to select the part you want, add fade in and fade out, and save as MP3 or WAV. Great for ringtones and clips.

Join several audio files into one — in any order, with an optional crossfade between tracks — and save as MP3 or WAV.

Normalize loudness to broadcast and streaming targets — −14 LUFS for Spotify/YouTube, −16 for podcasts, −23 for EBU R128 — measured to the ITU-R BS.1770 standard.

Speed up or slow down audio from 0.5× to 2× — keep the original pitch (time-stretch) or change it like a tape — for podcasts, lessons and practice.

Turn audio into a shareable video with an animated waveform, title and cover image — perfect for promoting podcast clips on social media.

Blur, pixelate or black out parts of a video — faces, license plates, screens or personal info. Draw areas on a frame, set when each one appears, and export MP4. Runs in your browser.

Burn SRT or VTT subtitles permanently into a video — adjustable size, color and outline — so captions show on every platform.

Speed up or slow down a video from 0.25× to 4× — with audio kept in sync and pitch preserved — for time-lapses and slow motion.

Crop the frame of a video — remove black bars, zoom in on a subject, or cut to square, vertical or widescreen — and download MP4.

Make beats in your browser — a 16-step drum sequencer with kick, snare, hi-hats, clap and more, preset patterns, swing and tempo — and export your loop as WAV/MP3.

Find the musical key of any song or audio file — major or minor, relative key and Camelot code for harmonic DJ mixing — analyzed privately in your browser.

Repeat a video clip 2 to 20 times — or ping-pong forward and back — to make longer loops for backgrounds, stories and presentations.

Join several video clips into one MP4 — in any order, even with different sizes and formats — right in your browser.

A precise online metronome — 20 to 300 BPM, time signatures, accented downbeats, subdivisions and tap tempo — for practice on any instrument.

Play MIDI files online with a piano-roll view, mute tracks, change speed or transpose, and convert MIDI to MP3 or WAV — all in your browser.

Remove the sound from a video instantly — no re-encoding, no quality loss — and download the silent MP4.

Remove hiss, hum and background noise from voice recordings, podcasts and videos' audio — adjustable strength, instant preview and download — processed privately in your browser.

Tune your guitar, ukulele, bass or any instrument with your microphone — see the note, the frequency and how many cents sharp or flat you are.

Change the pitch or key of a song by semitones without changing its speed — transpose for singing, practice or tuning — then download.

Turn a PowerPoint presentation into an MP4 video — choose seconds per slide, crossfade transitions and background music. 720p or 1080p, made in your browser.

Fit any video to 9:16 (Reels, TikTok, Shorts), 1:1, 4:5 or 16:9 — with blurred background, solid bars, or crop to fill — without distortion.

Play any audio backwards — reverse songs, voice messages and sound effects — and download the reversed file as MP3 or WAV.

Play a video backwards — reverse the picture (and optionally the sound) for fun effects and rewinds. Best for short clips.

Rotate a video 90°, 180° or 270°, or flip it horizontally or vertically — fix sideways phone videos in seconds.

Record your screen, a window or a browser tab — with optional microphone — right in your browser, then download the video. No install, no watermark.

Automatically cut silent gaps from podcasts, voice notes and lectures — set the threshold and minimum pause, keep a natural breath, and save the tighter audio.

Turn photos into a video slideshow — set seconds per photo, add music and choose 16:9, 9:16 or square — and download MP4.

Measure noise levels with your microphone — live decibel reading, peak, average and a history graph — with calibration and noise-exposure guidance.

See sound frequencies live from your microphone — real-time spectrum bars and a scrolling spectrogram, with the loudest frequency and note shown.

Dictate with your microphone and see the text appear live — in dozens of languages — then copy or download it. Works in Chrome, Edge and Safari.

Put two videos side by side or one above the other — for reactions, comparisons and duets — and download a single MP4.

Find the BPM of any song by tapping along — tap a key or the button on each beat to see beats per minute instantly, plus delay times in milliseconds.

A free online teleprompter — paste your script and it scrolls smoothly at your speed, with large text, mirror mode, a reading guide and full screen.

Have any text read aloud with natural voices — choose the voice, language, speed and pitch. Free, private and runs in your browser.

Play a pure tone at any frequency from 20 Hz to 20 kHz — sine, square, triangle or sawtooth — or sweep the range to test speakers and hearing.

Compress videos to share by email, WhatsApp or Discord — choose a quality level or a target size in MB, and optionally lower the resolution. Runs in your browser.

Convert videos between formats — MOV, MKV, AVI, WMV, FLV to MP4, or MP4 to WebM — for playback everywhere and on websites.

Save any frame of a video as a high-quality image, or extract frames every N seconds — plus see the video's resolution, duration and frame size.

Stabilize shaky phone and action-camera video in your browser — choose the shake strength and how to handle edges, and compare before and after side by side.

Turn a video clip into a high-quality animated GIF (with an optimized palette), or convert a GIF into a much smaller MP4.

Cut the start and end off a video, or keep just one part — frame-accurate trimming or instant lossless cuts — then download MP4.

Stamp text or your logo on a video — choose the position, size and transparency — to brand clips before posting.

Make a karaoke / instrumental track by removing center-panned vocals from stereo songs — with the bass kept — right in your browser.

Record your voice or upload audio and apply fun effects — chipmunk, deep voice, robot, alien, telephone, echo, cathedral reverb — then download.

Record your voice or any microphone in the browser — pause, play back and download the recording. No sign-up and nothing is uploaded.

Make quiet audio louder — boost volume by up to +30 dB with a built-in limiter that prevents harsh clipping — then save as MP3 or WAV.

Test your webcam and microphone online — live camera preview, resolution, a mic level meter and quick playback — before your next video call.

Play white, pink or brown noise in your browser for focus, sleep or masking sounds — with volume control and a sleep timer.

Look up what an acronym or abbreviation stands for — 220+ common ones from business, finance, tech, texting, medicine, government and everyday English.

Count words, characters, sentences and paragraphs as you type, with reading and speaking time estimates.

Count characters with and without spaces and see what's left against limits for X posts, SMS, titles and meta descriptions.

Count sentences and paragraphs and see average sentence length — a quick structure check for essays and articles.

Score how easy your text is to read: Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog, SMOG, Coleman-Liau and ARI.

Count syllables per word and per line — check a haiku's 5-7-5 pattern or the meter of a poem.

Find the most-used words in any text, with counts and percentages — also works as a keyword density checker.

Check whether a word, phrase or number reads the same backwards, ignoring spaces, punctuation and case.

Estimate how long a script or speech takes to deliver, at a slow, average or fast speaking pace.

Format a reference in APA 7, MLA 9, Chicago and Harvard at once — books, journal articles (with DOI, volume, issue and pages) and websites, with author names handled for you.

Translate text to Morse code and Morse back to text using the international standard, with letters, numbers and punctuation.

Convert English text to Unicode Grade 1 (uncontracted) braille and back, including capitals, numbers and punctuation.

Spell out names, codes and booking references in the NATO phonetic alphabet — Alfa, Bravo, Charlie — for clear calls.

Translate English into Pig Latin — move the first consonants to the end and add 'ay' (hello → ellohay, apple → appleway).

Encrypt and decrypt with the Caesar shift, ROT13 or the Vigenère cipher — including a brute-force view of all 25 Caesar shifts.

Score a headline or title for length, word balance, power and emotional words, numbers and clarity — with suggestions to make it more clickable.

Check an email subject line for length on mobile, spam-trigger words, excessive capitals, punctuation and emoji before you hit send.

Turn text into emoji — swap words like love, pizza, party and fire for matching emoji, or add them after the words.

Turn titles into clean, SEO-friendly URL slugs — lowercase, hyphenated, accents removed — with options to drop stop words and limit length.

Keep terminology consistent: list preferred terms and the variants to avoid, then check (and optionally fix) any text against your glossary.

Find the gender and article of German and French nouns — der, die or das; le or la. Common nouns are looked up; others are predicted from their ending, with how reliable that rule is.

Copy accented letters (é, ñ, ü, ç) and special symbols, with their HTML codes, Unicode values and Windows Alt codes.

Create references for websites and books in APA 7th, MLA 9th or Chicago style — fill in the details and copy the citation.

Shorten long articles, essays and reports to their key sentences — pick the summary length and get bullet points or a paragraph. Works offline in your browser.

Type Urdu in English letters (Roman Urdu) and get Urdu script instantly — common words are spelled correctly and everything else is transliterated phonetically.

Build a clear, arguable thesis statement from your topic, position and reasons — in argumentative, analytical, compare/contrast or expository form.

Create a structured outline for an essay, blog post, speech or report from your topic and main points — with the sections each part should contain.

Turn a rough request into a clear, structured prompt for ChatGPT, Claude or Gemini — with role, context, task, constraints and output format.

Build detailed prompts for Midjourney, DALL·E, Stable Diffusion and other image models — subject, style, lighting, camera and mood — with ready-made examples.

Convert text to UPPERCASE, lowercase, Sentence case, Title Case, camelCase, snake_case, kebab-case and more in one click.

Capitalize headlines correctly in AP, APA or Chicago style — short words stay lowercase, first and last words are always capitalized.

Join broken lines into flowing text — fix copy-pasted PDF and email text while keeping paragraph breaks if you want.

Delete repeated lines from a list and keep the first occurrence of each, with options to ignore case and blank lines.

Sort a list alphabetically, numerically, by length or randomly — ascending or descending, with natural number ordering.

Find and replace words or phrases across any text, with case-sensitive, whole-word and regular-expression options.

Reverse text backwards, reverse word order, or flip it upside down (ʇxǝʇ uʍop ǝpısdn) to paste anywhere.

Turn plain text into 𝐛𝐨𝐥𝐝, 𝑖𝑡𝑎𝑙𝑖𝑐, 𝓈𝒸𝓇𝒾𝓅𝓉, 𝕕𝕠𝕦𝕓𝕝𝕖-𝕤𝕥𝕣𝕦𝕔𝕜, s̶t̶r̶i̶k̶e̶ and more Unicode styles to paste into bios, posts and names.

Clean messy text in one pass: collapse extra spaces, strip empty lines, straighten smart quotes, remove HTML tags, emoji or non-ASCII characters.

Add bullets, numbers, a prefix or a suffix to every line of a list — or strip existing bullets and numbering.

Turn tab, comma or space separated text into a Markdown, HTML or aligned plain-text table.

Convert between American and British spelling — color/colour, center/centre, organize/organise, traveled/travelled and more.

Find passive-voice sentences in your writing, highlighted in place, with the share of sentences that use it.

Spot adverbs and filler words like 'very', 'really' and 'just' that weaken your writing, highlighted in your text.

Find overused clichés and business jargon — 'think outside the box', 'low-hanging fruit', 'at the end of the day' — in your writing.

Compare two versions of text or code line by line and see exactly what was added, removed or unchanged.

Generate lorem ipsum placeholder text by paragraphs, sentences or words — plain text or wrapped in HTML <p> tags.

Pick one or more random winners from a list of names or items — fair, secure randomness with no repeats.

Copy blank, invisible characters for empty messages, blank usernames or spacing where normal spaces get removed.

Look up the meaning of any English word — definitions by part of speech, example sentences and pronunciation — from Wiktionary.

Find your English level in about 10 minutes — 30 grammar and vocabulary questions from beginner (A1) to proficient (C2), with your CEFR level and explanations for every answer.

Check grammar, spelling, punctuation and style in English and 30+ other languages with LanguageTool's open-source rule engine — click a suggestion to fix it. No sign-up.

Convert English text to the International Phonetic Alphabet (IPA) in General American pronunciation, with stress marks — using the 135,000-word CMU Pronouncing Dictionary. Shows alternative pronunciations and ARPAbet.

A fast, distraction-free online notepad that saves automatically in your browser — multiple notes, search, word count, copy and .txt download. No account, nothing uploaded.

Measure how fast you read in words per minute, then check your understanding with a short quiz — and see how long any book would take you.

Turn typed text into realistic handwriting on ruled, graph, legal or plain paper — choose the handwriting style, ink color and messiness, then download PNG or a multi-page PDF.

Translate short texts between 50+ languages using the MyMemory translation memory — sentence by sentence, with a quick swap button. Free, no sign-up, about 5,000 characters a day.

Test your typing speed in words per minute with accuracy — 30, 60 or 120-second tests with fresh text every time.

Conjugate Spanish, French, Italian and German verbs in all the main tenses — present, past, imperfect, future, conditional, perfect and subjunctive — with irregular and stem-changing verbs.

Convert men's and women's shoe sizes between US, UK, EU and centimeters, plus the men's ↔ women's equivalent — with the full size chart.

Convert clothing sizes between US, UK, EU and Italian sizing — women's dresses and tops, men's shirts (collar) and men's suits and jackets — with S/M/L letters.

Convert between centimeters, inches, feet, meters, kilometers, miles and more — with a full table of every unit.

Convert kilograms, pounds, ounces, grams, stones, tons and tola instantly, with every unit shown side by side.

Convert Celsius, Fahrenheit, Kelvin and Rankine accurately, including negative temperatures.

Convert square feet, square meters, acres, hectares, marla and kanal — handy for plots, rooms and land.

Convert liters, milliliters, US and UK gallons, cups, fluid ounces, cubic feet and more.

Convert km/h, mph, meters per second, knots and feet per second.

Convert bits, bytes, KB, MB, GB and TB — in both decimal (1000) and binary (1024, KiB/MiB/GiB) units.

Convert internet and transfer speeds between Mbps, Gbps, MB/s and more — see what a connection speed means in file terms.

Convert seconds, minutes, hours, days, weeks, months and years, including milliseconds and microseconds.

Convert psi, bar, kPa, atmospheres, mmHg and inHg — for tires, weather, gauges and science.

Convert joules, calories, kilocalories, kWh, BTU, electronvolts and therms.

Convert watts, kilowatts, horsepower (mechanical and metric), BTU per hour and refrigeration tons.

Convert hertz, kilohertz, megahertz, gigahertz and revolutions per minute (RPM).

Convert degrees, radians, gradians, arcminutes, arcseconds and turns.

Convert between km/L, US mpg, UK mpg and L/100 km — including the inverse L/100 km scale used in Europe.

Convert sieverts, millisieverts, microsieverts, rem and millirem for radiation dose equivalents.

Convert kg/m³, g/cm³, g/mL, kg/L, lb/ft³ and lb/in³.

Convert newton-meters, pound-feet, pound-inches and kilogram-force meters for bolts, engines and tools.

Convert newtons, kilonewtons, pound-force, kilogram-force and dynes.

Compare national minimum wages across the EU in 2026 — monthly and hourly, from €620 in Bulgaria to €2,704 in Luxembourg — and see which countries set wages by collective agreement instead.

See the true cost of sending money abroad — the upfront fee plus the hidden exchange-rate markup — and compare your bank with a transfer service to find out how much the recipient really gets.

How long SEPA transfers take and what they cost in 2026 — SEPA Instant (10 seconds, same price as standard since October 2025), standard credit transfers, direct debits, cut-off times, Verification of Payee and the 36 SEPA countries.

Where do you pay tax and social security if you live in one EU country and work in another? The key rules for frontier workers and remote workers — tax treaties, the EU social security coordination rules, telework limits and special deals like France–Switzerland and Belgium–Luxembourg.

Estimate net salary in Belgium, Austria or Portugal for 2026 — employee social security and income tax with each country's 2026 brackets, allowances and special rules (Austria's 13th/14th salaries at 6%, Belgium's communal tax, Portugal's specific deduction).

Calculate take-home pay in Sweden, Denmark or Norway for 2026 — Swedish municipal and state tax with the basic deduction and job tax credit, Danish AM-bidrag and the new middle tax, and Norwegian bracket tax and national insurance.

Calculate your Swiss net salary for 2026 — AHV/IV/EO, unemployment insurance, accident insurance and occupational pension (BVG) by age — plus the exact 2026 direct federal tax and your cantonal/communal tax rate.

Convert a French gross salary (brut) to net (net) for 2026 — cadre or non-cadre social contributions, net taxable pay, and income tax (impôt sur le revenu) with family quotient and décote.

Calculate your Dutch net salary for 2026 — box 1 income tax and national insurance, general tax credit and labour tax credit, pension contribution, and the 30% ruling for expats.

Estimate your Spanish net salary for 2026 — Social Security (6.5%), IRPF with the work-income reduction and personal and family minimums — per year, per month in 12 or 14 payments.

Calculate your Italian net salary for 2026 from the gross (RAL) — INPS 9.19%, IRPEF at the new 23/33/43% rates, employee deductions, the cuneo fiscale bonus and regional/municipal surcharges.

Calculate Irish take-home pay for 2026 — PAYE income tax at 20%/40% with tax credits, USC, and PRSI (4.2%, rising to 4.35% in October 2026) — for single people, single parents and married couples.

Calculate Polish net salary (netto) from gross (brutto) for 2026 on an employment contract — ZUS contributions, 9% health contribution, PIT at 12%/32% with the PLN 30,000 tax-free amount, and the under-26 relief.

Add or remove VAT at the standard rate for any EU country, the UK, Norway or Switzerland — rates as of September 2025, or enter your own rate.

Standard VAT rates for all 27 EU member states plus the UK, Norway, Switzerland and Iceland — as of September 2025.

Check whether an IBAN is valid — country length, format and the mod-97 check digits — and see it formatted in groups of four.

Generate random, checksum-valid IBANs for software testing — for Germany, France, the Netherlands, Spain, Italy, the UK and more.

Project the tax-free growth of a UK Stocks & Shares or Cash ISA with monthly contributions, capped at the £20,000 annual allowance.

Calculate UK mortgage payments for repayment or interest-only mortgages, with the loan-to-value (LTV) band and total interest.

Estimate a variable-rate euro mortgage payment from the Euribor index plus your bank's margin — and see how it changes if Euribor moves.

Work out the day or hourly rate you need as a freelancer to hit a target take-home income after business costs, tax and unpaid time off.

Calculate pro-rata annual leave for part-time work or a partial year — UK statutory 5.6 weeks, EU minimum 4 weeks, or your contract's entitlement.

Compare VAT due under the UK Flat Rate Scheme with standard VAT accounting — including the 16.5% limited-cost trader rate.

Calculate your German net salary for 2026 from gross — income tax (Lohnsteuer) by tax class, solidarity surcharge, church tax, and pension, unemployment, health and care insurance — per month and per year.

Calculate German income tax for 2026 on your taxable income (zu versteuerndes Einkommen) — basic tariff or joint assessment (Splitting) — with solidarity surcharge, church tax, and marginal and average rates.

Work out German church tax (Kirchensteuer) for 2026 — 8% of income tax in Bavaria and Baden-Württemberg, 9% elsewhere — and how much you'd save by leaving the church.

Calculate take-home pay and employer costs for a German Minijob (up to €603 a month in 2026) or Midijob (€603.01–€2,000) — with the reduced employee contributions in the transition zone.

Check if you qualify for Germany's small business VAT exemption (Kleinunternehmerregelung, § 19 UStG) in 2026 — €25,000 last year and €100,000 this year — and whether it's worth using.

Convert an hourly wage to an annual salary and back — with weekly, biweekly, semimonthly and monthly pay — for any hours per week.

Calculate gross pay with overtime at time-and-a-half, double time and holiday rates for any hourly wage.

Split your take-home pay into needs, wants and savings with the 50/30/20 rule — or set your own percentages — and compare with your actual spending.

Add up what you own and what you owe to find your net worth — cash, investments, retirement, property and vehicles minus mortgages, loans and cards.

Find how big your emergency fund should be — 3 to 6+ months of essential expenses — and how long it will take to save it.

Work out how much to save each month to reach a goal by a target date — for a house deposit, car, wedding, trip or any sinking fund.

Calculate the interest earned in a high-yield savings account or certificate of deposit (CD) from the APY and term, with optional monthly deposits.

Convert between APR (nominal rate) and APY (effective annual yield) for any compounding frequency to compare loans and savings fairly.

See how long it will take to pay off a credit card and the total interest — or the monthly payment needed to be debt-free by a target date.

Estimate the interest charged on a credit card balance for a billing cycle using the daily periodic rate, as most US card issuers do.

Plan your way out of debt: compare the snowball (smallest balance first) and avalanche (highest interest first) methods — payoff date, interest and order.

Calculate your front-end and back-end debt-to-income ratios — the numbers mortgage and loan lenders use to judge what you can afford.

Calculate your overall and per-card credit utilization ratio — a major factor in your credit score — and how much to pay to get under 30% or 10%.

See whether a 0% balance transfer card saves money after the transfer fee — and what's left when the promotional rate ends.

Calculate your new salary after a percentage raise — or the raise percentage between an old and new salary — per year, month and hour.

Count a till, cash drawer or coin jar: enter how many of each US bill and coin you have and get the total instantly.

Add up all your subscriptions — streaming, apps, gym, software — to see what they really cost per month and per year.

See what a daily habit — coffee, takeout, cigarettes — costs over the years, and what the money could grow to if invested instead.

Estimate how much life insurance cover you need with the DIME method — debts, income replacement, mortgage and education — minus savings and existing cover.

Compare monthly federal student loan payments under the new Repayment Assistance Plan (RAP, from July 2026), Income-Based Repayment (IBR) and the 10-year standard plan — using your AGI, family size and 2026 poverty guidelines.

Look up the 2026 state pension (retirement) age in 35 countries across Europe and beyond — current age, legislated future increases, and whether it's linked to life expectancy — and how many years you have to go.

Which European countries tax inheritances, estates and gifts — and at what rates — from Austria's zero to Spain's regional system, with key allowances for spouses and children.

How much you can send and receive with Zelle, Cash App, Venmo and PayPal — verified vs unverified limits, instant transfer fees, and buyer-protection differences — plus how to raise your limits safely.

Do you need an ESTA for the US, an ETA for the UK or Canada, or ETIAS for Europe? Who needs each, the cost, how long it lasts and how to apply on the official sites — plus the latest on ETIAS's delayed launch.

Work out the sale price and how much you save — with stacked discounts (e.g. 20% off then an extra 10%) and sales tax.

Calculate the tip and split the bill between any number of people, with the option to round each share up.

Add sales tax, VAT or GST to a price, or remove it from a tax-inclusive price to find the net amount and the tax paid.

Compare products by price per unit — per 100 g, per kg, per litre or per item — to find which pack size is the best value.

Calculate zakat at 2.5% on cash, gold, silver, investments and business stock, checked against the gold or silver nisab using today's prices you enter.

Find what gold is worth by weight and purity — 24K, 22K, 21K, 18K or 14K — in grams, tola or troy ounces, using the price you enter.

Work out UK income tax for 2026/27 on salary, pension, rental, savings and dividend income — England, Wales, Northern Ireland or Scotland — with the personal allowance taper and a band-by-band breakdown.

Calculate your take-home pay in the UK for 2026/27 — income tax (including Scotland), National Insurance, pension contributions and student loan repayments — per year, month and week.

See how much you'll repay on a UK student loan each month for 2026/27, and project whether you'll clear it before it's written off — for Plans 1, 2, 4, 5 and postgraduate loans.

See how much tax relief you get on UK pension contributions in 2026/27 — relief at source (SIPP/personal pension), net pay or salary sacrifice — including the extra higher-rate relief to claim and the 60% trap above £100,000.

Calculate UK Capital Gains Tax for 2026/27 on shares, crypto, second homes or business assets — £3,000 allowance, 18%/24% rates, losses, and Business Asset Disposal Relief at 18%.

Calculate tax on UK dividends for 2026/27 — the £500 allowance and the new 10.75% / 35.75% rates (39.35% additional) — stacked on your salary, for investors and company directors.

Estimate your Self Assessment bill for 2026/27 — income tax and Class 4 National Insurance on self-employed profits, plus other income — with payments on account and the January/July deadlines.

Work out your Child Benefit for 2026/27 (£27.05 a week for the eldest child, £17.90 for each other child) and any High Income Child Benefit Charge if either parent earns over £60,000.

Estimate your gas and electricity bill under Ofgem's price cap for 1 October – 31 December 2026 — unit rates and standing charges for Direct Debit customers — from your kWh usage or a typical household profile.

Work out UK vehicle tax (VED) for 2026/27 — the first-year rate by CO₂ emissions, the £200 standard rate, and the £440 expensive car supplement (list price over £40,000, or £50,000 for electric cars).

Calculate statutory redundancy pay in the UK from 6 April 2026 — weeks' pay by age and years of service, the £751 weekly cap (£783 in Northern Ireland), up to 20 years — and see whether it's tax-free.

Work out your notice period and last working day — UK statutory minimum notice (one week per year of service, up to 12 weeks) or your contractual notice in weeks, months or days.

See what each council tax band A–H costs in England for 2026/27 from your council's Band D (or the £2,392 average), how bands are set, and discounts like the 25% single person discount.

Calculate Statutory Maternity Pay (SMP), Paternity Pay (SPP) and Shared Parental Pay for 2026/27 — 90% of average weekly earnings for 6 weeks, then £194.32 a week — with week-by-week totals.

Estimate your monthly Social Security retirement benefit from your average earnings using the 2026 formula — and compare claiming at 62, full retirement age, or 70.

Estimate your 2026 Medicare costs — the $202.90 Part B premium, income-related surcharges (IRMAA) for Part B and D, Part A premium if you lack 40 work credits, and deductibles.

Estimate your 2026 ACA premium tax credit — what you'll pay for the benchmark silver plan based on income and household size, with the 400% poverty-line cliff that returned in 2026.

Project the value of Series I savings bonds — composite rate from the fixed rate and inflation, semiannual compounding, and the 3-month interest penalty if you cash out before 5 years. Defaults to the May–October 2026 rates.

Every key federal tax deadline for 2026 and early 2027 — filing day, extensions, quarterly estimated payments, W-2/1099 due dates and business returns — adjusted for weekends.

How long an IRS refund takes and what each “Where's My Refund?” status means — e-file vs paper, EITC holds, amended returns, identity checks and offsets — with links to the official trackers.

Calculate sales tax for any US state with 2026 rates — the state rate, the average combined state + local rate, and the highest local rate — or enter your exact local rate. Add tax or back it out of a total.

Estimate 2026 state income tax for any US state from the latest brackets, standard deductions and personal exemptions — and compare your state with every other state.

Look up the current minimum wage in every US state and DC, and see what it pays per week, month and year for your hours — with local and small-employer exceptions noted.

Check whether an estate owes state estate tax or heirs owe inheritance tax in 2026 — exemptions and rates for the 12 states + DC with an estate tax and the 5 states with an inheritance tax, including New York's cliff.

Estimate your 2026 federal income tax — wages, self-employment, investments, the standard or itemized deduction, new senior/tips/overtime deductions, Child Tax Credit and EITC — with your marginal and effective rates.

See which 2026 federal tax bracket you're in, how much of your income falls in each bracket, and your marginal vs effective tax rate.

Calculate federal tax on stock, crypto or property gains for 2026 — short-term vs long-term (0%, 15%, 20%), stacked on your other income, plus the 3.8% net investment income tax.

Calculate 2026 self-employment tax (Social Security + Medicare) for freelancers, contractors and sole proprietors — with the half-SE-tax deduction and the $184,500 Social Security wage base.

Work out your 2026 quarterly estimated tax payments — using the safe-harbor rules (100%/110% of last year or 90% of this year) to avoid underpayment penalties — with every due date.

Check if your paycheck withholding is on track for 2026 — project your tax, compare it with what you'll have withheld, and get the extra amount per paycheck to enter on your W-4.

Should you itemize in 2026? Compare the standard deduction with your itemized deductions — SALT (new $40,400 cap), mortgage interest, charity (new 0.5% floor) and medical — including the new $1,000/$2,000 charitable deduction for non-itemizers.

Calculate your 2026 Child Tax Credit — $2,200 per child under 17, up to $1,700 refundable — plus the $500 credit for other dependents, with the income phase-out.

Check if you qualify for the 2026 Earned Income Tax Credit and estimate the amount — up to $664 with no children, $4,427 with one, $7,316 with two and $8,231 with three or more.

Estimate your federal tax refund (or balance due) for tax year 2026 from your income, withholding, dependents and deductions — including the new senior, tips and overtime deductions.

See how much of your bonus you'll take home — federal supplemental withholding (22%, or 37% above $1 million), Social Security, Medicare and state tax — and whether you'll get some back at tax time.

Calculate your take-home pay per paycheck for 2026 — federal income tax, Social Security, Medicare, your state's income tax rate, 401(k), HSA and health premiums — for hourly or salaried pay.

Find your 2026 HSA contribution limit — $4,400 self-only or $8,750 family, plus $1,000 at 55+ — prorated for partial-year coverage, minus employer contributions, and see your tax savings.

Plan your 2026 flexible spending account — the $3,400 health FSA limit and $680 carryover, the new $7,500 dependent care FSA limit — and see your tax savings and use-it-or-lose-it risk.

See whether a gift uses your lifetime exemption or needs Form 709 — 2026 annual exclusion of $19,000 per recipient ($38,000 with gift splitting), $15 million lifetime exemption, and 40% tax above it.

Estimate federal tax on gambling winnings for 2026 — 24% withholding, how winnings add to your income, and the new rule that only 90% of gambling losses are deductible (itemizers only).

See the 2026 tax cost of converting a traditional IRA or 401(k) to a Roth — the extra federal and state tax, the bracket you land in, and how much you can convert while staying in your current bracket.

Estimate the tax when you exercise employee stock options in 2026 — NSOs taxed as wages (income tax + FICA) and ISOs with the alternative minimum tax (AMT), using 2026 AMT exemptions and the new 50% phase-out.

Estimate US federal tax on crypto for 2026 — short- and long-term gains from selling or trading coins, plus staking, mining and airdrop income taxed as ordinary income.

Calculate what an employee really costs in 2026 — employer Social Security and Medicare (7.65%), FUTA, state unemployment (SUTA), benefits and 401(k) match — per paycheck and per year.

Compare taxes as a single-member LLC (sole proprietor) versus an S corporation in 2026 — self-employment tax vs payroll tax on a reasonable salary, plus S-corp running costs — to see if the election saves money.

See how much tax a 1031 like-kind exchange defers when you sell investment real estate — capital gain, depreciation recapture, NIIT and state tax — and the tax on any cash boot you take.

Convert between 30 major currencies with official European Central Bank reference rates — updated every working day — with 1-month to 5-year rate history charts.

Calculate Stamp Duty Land Tax on a home in England or Northern Ireland — standard rates, first-time buyer relief up to £500,000, the 5% surcharge on additional homes and the 2% non-resident surcharge.

Calculate your car payment with sales tax, fees, down payment and trade-in value — including negative equity from a car you still owe on.

Calculate a car lease payment from the price, residual value, money factor and term — with the depreciation and finance charges broken out.

Compare leasing a car with buying it on a loan over the same period — total payments, what the car is worth at the end, and the net cost of each.

Estimate student loan payments on a 10-year standard or 25-year extended plan (or any term), and what refinancing to a new rate would save.

Compare up to three loan offers side by side — monthly payment, total interest, fees and true APR — to find the cheapest.

Calculate simple interest on a loan or deposit — interest, total amount, or solve for the rate or time — with days, months or years.

Reveal the real annual percentage rate (APR) of a payday or short-term loan from its fee and length — and what rolling it over would cost.

Calculate the monthly payment (EMI), total interest and full repayment schedule for any personal, car, home or business loan.

Estimate your monthly mortgage payment with principal, interest, property tax, home insurance, PMI and HOA — plus total interest and an amortization schedule.

Estimate the home price you can afford from your income, debts, down payment and interest rate, using the 28/36 debt-to-income rule lenders use.

Generate a full month-by-month amortization schedule showing each payment's principal, interest and remaining balance — downloadable as CSV.

Find out if refinancing pays off: new monthly payment, monthly savings, break-even point on closing costs and the change in total interest.

Estimate an FHA mortgage payment including the upfront and annual mortgage insurance premium (MIP), property tax and insurance, with 3.5% minimum down.

Estimate a VA home loan payment including the VA funding fee (based on down payment and first or subsequent use), with $0 down allowed and no PMI.

Estimate private mortgage insurance (PMI) on a conventional loan with less than 20% down — monthly cost and when it drops off at 78% loan-to-value.

Work out the down payment for a home at any percentage, the resulting loan amount, and how long it will take to save for it.

Find how much you can borrow against your home with a HELOC or home equity loan, and estimate the interest-only and repayment payments.

See how much cash you can take out by refinancing, and what your new mortgage payment would be after closing costs.

See how paying half your mortgage every two weeks — 26 half-payments, or 13 full payments a year — shortens your loan and cuts interest.

Decide whether buying mortgage discount points is worth it: upfront cost, monthly savings and the break-even month.

Compare an adjustable-rate mortgage (e.g. 5/1 or 7/1 ARM) with a fixed-rate loan — payments before and after the reset and total cost over the years you'll keep it.

See your new monthly payment after recasting your mortgage with a lump-sum payment, and the interest you'll save — without refinancing.

Estimate your monthly escrow payment for property tax, homeowners insurance, PMI and HOA — plus the cushion lenders may hold.

Find how much rent you can afford using the 30% rule, the 40× rent income test landlords use, and a budget that accounts for your debts.

Split rent fairly between roommates — equally, by room size, or by income — with shared space divided evenly.

Calculate prorated rent for a partial month when moving in or out mid-month — by the actual days in the month, a 30-day month or a 365-day year.

Calculate a new rent after a percentage increase, or the percentage between old and new rent — and compare it with a rent cap you enter.

Compare the long-term cost of renting versus buying a home, including appreciation, rent increases, maintenance and the return you'd earn investing the down payment.

Analyze a rental property: net operating income, cap rate, monthly cash flow and cash-on-cash return, after vacancy, expenses and the mortgage.

Run the numbers on a Buy-Rehab-Rent-Refinance-Repeat deal: all-in cost, cash left in the deal after the refinance, and cash flow on the new loan.

Estimate the profit and ROI on a fix-and-flip: purchase, rehab, holding and financing costs against the sale price after commissions — plus the 70% rule check.

Estimate what you'll walk away with when selling your home after agent commission, closing costs, repairs and paying off the mortgage.

Compare property listings by price per square foot, square metre or acre — and estimate a value from a local price per square foot.

Estimate how much you could borrow with an FHA reverse mortgage (HECM) in 2026 — the principal limit for your age, home value and interest rate, upfront costs, paying off an existing mortgage, and the first-year limit.

Estimate yearly property tax on a home in any US state and county using effective tax rates for all 3,100+ counties — and compare your county with the state and national picture.

Calculate profit or loss on a Bitcoin, Ethereum or any crypto trade from the amount invested, buy and sell prices, and exchange fees.

Estimate staking rewards from an APY or APR — daily, monthly and yearly — with or without compounding, in coins and in your currency.

Estimate mining profit from your hashrate, the network hashrate, block reward and electricity cost — daily, monthly and the break-even on hardware.

Calculate impermanent loss for a 50/50 liquidity pool (Uniswap v2 style) when token prices change — compared with simply holding the tokens.

Value your gold and silver holdings by troy ounce or gram at today's spot price, with the gain or loss against what you paid.

See how savings grow with compound interest and regular deposits — any compounding frequency, with a year-by-year growth table.

Calculate return on investment as a percentage, plus the annualized return (CAGR) when you know how long the investment was held.

See how inflation changes the value of money — what today's amount will cost in the future, or what it's really worth after years of price rises.

Check whether your savings will last through retirement: projected balance at retirement, the income it can support and the age it might run out.

Project your 401(k) balance at retirement with your contributions, employer match, salary increases and investment returns — capped at the IRS annual limit.

Compare Roth and traditional retirement contributions: which leaves you more to spend in retirement, based on your tax rate now and in retirement.

Calculate your required minimum distribution from a traditional IRA or 401(k) using the IRS Uniform Lifetime Table.

Find your FIRE number and how many years until you're financially independent — or how long until you have $1 million — from your savings and spending.

See how much you can withdraw from a portfolio each year and how long the money lasts with inflation-adjusted withdrawals.

Find your Coast FIRE number — the amount that, left to grow with no more contributions, reaches your retirement target — and whether you've hit it.

Compare a monthly pension with a one-time lump sum: the pension's present value and the return you'd need on the lump sum to match it.

Calculate the regular payout an annuity or lump sum can provide for a set number of years at a given interest rate — monthly, quarterly or yearly.

Calculate the compound annual growth rate (CAGR) between a starting and ending value — or project a future value from a growth rate.

Estimate how long it takes to double your money at a given return — or the return needed to double in a set time — with the exact answer for comparison.

Convert a nominal investment return into a real, inflation-adjusted return — and see what your money is really worth after a number of years.

See how much a fund's expense ratio costs you over time — the difference between your balance with and without fees.

Get a starting stock/bond mix for your age and risk tolerance using the classic 100/110/120-minus-age rules — and see it in dollars.

Estimate the future cost of college and how much to save each month in a 529 plan or savings account to cover it.

See how much you'd actually receive from an early 401(k) or IRA withdrawal after the 10% penalty and income tax.

See what an investment in the S&P 500 (with dividends reinvested) grew to between any two years from 1928 to 2025 — total and annualized return, compared with Treasury bills, 10-year bonds and gold.

Find your average cost per share after buying a stock, ETF or coin at different prices — and the price you need to break even.

Calculate profit or loss on a stock trade including commissions — dollar gain, percentage return and break-even sell price.

Calculate a stock's dividend yield and your annual and monthly dividend income from the share price, dividend per payment and number of shares.

Project how a dividend stock grows when dividends are reinvested — shares, value and yearly income — with dividend and price growth.

Calculate profit or loss at expiration for buying or selling calls and puts — break-even price, max profit, max loss and a price-by-price table.

Work out how many shares to buy so a stop-loss limits your loss to a set percentage of your account — plus the risk/reward ratio to your target.

Find the buys and sells that bring your portfolio back to its target allocation — optionally using only new money so you don't have to sell.

See the result of investing a fixed amount at regular intervals: shares bought, average cost per share and gain — compared with investing a lump sum at the start.

Calculate a bond's current yield and yield to maturity (YTM) from its price, coupon rate, face value and years to maturity.

Calculate T-bill returns: purchase price from the discount rate, interest earned, and the investment rate (bond-equivalent yield) to compare with savings.

Estimate the gain from an employee stock purchase plan (ESPP) with a discount and lookback provision, and your return on the money contributed.

Estimate the tax on vesting restricted stock units (RSUs): the value taxed as income, the shares withheld at the supplemental rate, and any shortfall at your real rate.

Check a list of trades for possible wash sales — losses on sales where the same security was bought within 30 days before or after.

Estimate the tax saved by selling investments at a loss to offset capital gains and up to $3,000 of ordinary income a year (US rules).

Value a stock: market capitalization, P/E and earnings yield — plus an intrinsic value per share from a discounted cash flow (DCF) model.

See what percentage gain you need to recover from a loss — a 50% drop needs a 100% gain — and how long it takes at a given return.

Convert between the top 100 cryptocurrencies and 20 fiat currencies with live prices — BTC, ETH, SOL, USDT and more — plus a top-10 market table.

See what dollar-cost averaging into Bitcoin, Ethereum and other coins would have returned — any amount, daily/weekly/monthly, from any start date — using real historical prices, compared with a lump sum.

See live Ethereum gas prices (base fee and priority tips) and what common transactions cost right now in ETH and US dollars — transfers, token sends, swaps, NFT mints and contract deployments.

Work out profit, margin and ROI for a product sold through Fulfillment by Amazon — referral fee, FBA fulfillment fee, monthly storage, inbound shipping, product cost and ads — per unit and per month.

Find the billable weight of a parcel (actual vs dimensional weight) for UPS, FedEx, DHL and USPS, and estimate shipping cost from a carrier's rate per pound or kilogram.

Estimate import duty and VAT/sales tax on goods you buy or ship from abroad — US (no de minimis since August 2025), EU (import VAT plus the new €3 low-value duty) and UK (£135 rule) — from value, shipping and duty rate.

Model SaaS revenue and unit economics — MRR and ARR from customers and price, churn, customer lifetime value (LTV), customer acquisition cost (CAC), LTV:CAC ratio, and CAC payback months.

Turn product details into ready-to-use descriptions — a punchy headline, benefit-led paragraph, bullet features and specs — in short, standard or Amazon-style formats. No AI, no sign-up.

Estimate closing costs and cash to close when buying a home — loan fees, points, appraisal, title insurance, escrow, prepaid interest and taxes, transfer tax — itemised, with the typical 2–5% range.

Estimate short-term rental income and profit — nightly rate, occupancy, cleaning fees, platform fees, cleaning costs, utilities, management and mortgage — and compare it with a long-term rent.

Compare what two brokers or platforms really cost you over time — trading commissions, platform or custody fees, FX fees and fund expense ratios — and see the impact on your portfolio after 10–30 years.

Compare the real multi-year cost of web hosting plans — introductory vs renewal prices, domain renewals, SSL, email and backups — so a cheap first-year deal doesn't hide an expensive renewal.

Calculate profit, gross margin and markup from cost and price — or find the selling price you need for a target margin or markup.

Calculate advertising cost metrics — CPM, CPC, CPA and CTR — from spend, impressions, clicks and conversions. Leave one blank to solve for it.

Calculate return on ad spend (ROAS), ad-driven profit after product costs, and the break-even ROAS for your margin.

Estimate customer lifetime value from average order value, purchase frequency, gross margin and retention — and compare it with acquisition cost.

Calculate monthly customer churn and retention, the equivalent annual churn, and the average customer lifetime.

Calculate monthly and annual recurring revenue, net new MRR and growth from new, expansion, contraction and churned MRR.

Calculate your conversion rate from visitors and conversions — plus the revenue impact of improving it.

Check whether an A/B test result is statistically significant — conversion rates, relative uplift, p-value and confidence using a two-proportion z-test.

Find the sample size you need for a survey (margin of error) or an A/B test (minimum detectable effect) at your chosen confidence and power.

See how a price increase affects revenue and profit — and how many customers or sales you could lose before it stops paying off.

Build a tiered or volume-discount price table and calculate the total for any quantity — with all-units or graduated (per-tier) pricing.

Find how many units you need to sell — and how much revenue — to cover fixed costs, plus the units needed for a target profit.

Calculate a parcel's dimensional weight and billable weight for UPS, FedEx, USPS, DHL and other carriers using their divisor.

Estimate the true cost of an employee beyond salary — payroll taxes, benefits, retirement match, equipment and overheads — per year and per hour.

Compare a 1099 contractor rate with a W-2 salary: what hourly rate matches a salary once self-employment tax, benefits and unpaid time off are counted.

Add up one-time launch costs and monthly running costs to find how much money you need to start a business and cover a runway.

Project your business's cash balance month by month for a year from starting cash, revenue growth and fixed and variable costs — and spot when it runs low.

Calculate interest and late fees on an overdue invoice — by annual rate or monthly percentage, with a fixed fee — for the days it's overdue.

Add up a week of start and end times with breaks, get total hours in hours:minutes and decimal, and calculate pay with overtime over 40 hours.

Find out what a meeting really costs from the number of attendees, their average salary and its length — per meeting and per year if it repeats.

Calculate when to reorder stock (reorder point with safety stock) and how much to order (economic order quantity) to minimize inventory costs.

Calculate business mileage reimbursement at the IRS standard rate, UK HMRC approved rates (45p/25p) or your company's rate.

Calculate asset depreciation with straight-line, double-declining balance or sum-of-the-years'-digits methods, with a full yearly schedule.

Estimate what a small business is worth using revenue, EBITDA and seller's discretionary earnings (SDE) multiples, with a low–high range.

Calculate sales commission with a flat rate or tiered (graduated) rates, plus base salary, for any sales amount.

Find the due date for Net 7, 15, 30, 45, 60 or 90 payment terms from the invoice date, with the option to roll weekend dates to Monday.

Get proven pricing-page experiments for your business and goal — plan layout, anchoring, annual billing, trials, social proof and more — each with the reason it works and the metric to track.

Calculate Etsy fees — listing, transaction, payment processing and Offsite Ads — and your profit per sale after materials and shipping.

Estimate eBay final value fees and the per-order fee on a sale, plus your profit after item cost and shipping.

Calculate Shopify payment processing fees, third-party gateway fees and your monthly plan cost per order — and the profit left on each sale.

Calculate payment processing fees for Stripe, PayPal, Square and Venmo — what you receive from a payment, or what to charge to receive an exact amount.

Work out your payout and profit on Poshmark, Depop and other resale apps after selling and payment fees — or enter any platform's fee.

Find the real profit per order for a dropshipping product after supplier cost, shipping, payment fees and ad spend — plus break-even CPA and ROAS.

Calculate profit per item for print-on-demand products (t-shirts, mugs, posters) after the base cost, shipping and your store's fees.

Check if your EU cross-border B2C sales exceed the €10,000 threshold and calculate the VAT due in each customer's country for your One-Stop-Shop (OSS) return, using current standard rates.

Find out who charges VAT on a cross-border sale in the EU — you, or your customer under the reverse charge — for goods and services, B2B and B2C, inside and outside the EU, with the invoice wording to use.

Design a business card with your logo and details, then download a print-ready sheet of 10 cards with cut marks — or a single card for a print shop. Front and back, US or EU size.

Create a professional HTML email signature for Gmail, Outlook and Apple Mail — photo, logo, contact details and social links — and copy it in one click. Free, no sign-up.

Check whether an EU VAT number is valid and active using the European Commission's VIES service — with the registered company name and address where the country shares them. Needed before applying the reverse charge.

Search the Harmonized System by product name or code to find the 2-, 4- and 6-digit HS code for customs declarations, commercial invoices and duty lookups — all 6,900+ headings and subheadings.

Create a professional invoice, quote or estimate in minutes — logo, line items, tax/VAT, discounts and payment terms — and download a clean PDF. No sign-up, nothing uploaded.

Design a simple, professional logo in minutes — your brand name, an icon, five layouts, fonts and colors — and download a transparent PNG or SVG. Free, no watermark, no sign-up.

Calculate your body mass index from height and weight in metric or US units, see your WHO weight category and the healthy weight range for your height.

Estimate your daily calorie needs (TDEE) and resting metabolic rate (BMR) with the Mifflin-St Jeor equation, plus targets to lose or gain weight.

Estimate body fat percentage from your neck, waist (and hip) measurements and height with the US Navy tape method, plus fat and lean mass.

Split your daily calories into protein, carbohydrate and fat grams — balanced, high-protein, low-carb or keto — or set your own percentages.

Find how much protein you need per day based on body weight and goal — general health, endurance, building muscle or losing fat.

Estimate how much water to drink each day from your body weight and exercise, in litres, ounces and glasses.

Estimate ideal body weight from height and sex with the Devine, Robinson, Miller and Hamwi formulas — alongside the healthy BMI weight range.

Calculate your waist-to-hip and waist-to-height ratios — simple measures of abdominal fat linked to heart and metabolic health risk.

Estimate lean body mass with the Boer formula (or from your body fat %) and your fat-free mass index (FFMI), normalized to 1.8 m.

Estimate your one-rep max from the weight and reps you lifted with the Epley, Brzycki and Lombardi formulas, plus a percentage chart for programming.

Work out which plates to load on each side of the barbell to hit a target weight, in kilograms or pounds, with your available plates.

Compare powerlifting strength across body weights with the DOTS and original Wilks formulas from your total and body weight.

Calculate running pace, finish time or distance — per km or per mile — with speed in km/h and mph and splits for the whole race.

Predict your 5K, 10K, half marathon and marathon times from a recent race result using Riegel's formula.

Estimate your VO2 max (aerobic fitness) from a 12-minute Cooper run test or from your resting and maximum heart rate.

Calculate your five heart rate training zones and target heart rate with the Karvonen (heart rate reserve) method or a simple % of max.

Estimate calories burned walking, running, cycling, swimming, lifting and 20+ other activities from your weight and the time spent.

Convert a step count into miles or kilometres using your height (or a measured stride length), plus a rough calorie estimate.

Calculate bike speed from cadence and gearing (chainring, cog, wheel size), plus gear ratio, gear inches and development.

Calculate your swim pace per 100 m or 100 yd from distance and time — and predict times for other swim distances.

Score your heart and overall health habits from 0 to 100 using the American Heart Association's Life's Essential 8 — diet, activity, nicotine, sleep, weight, cholesterol, blood sugar and blood pressure — with what to improve first.

A rough, just-for-fun estimate of height from shoe size or foot length, based on the average ratio of foot length to height (about 15%). Shows the likely range — individual proportions vary a lot.

Estimate your 10-year risk of heart attack, stroke and heart failure with the American Heart Association's PREVENT equations (2023) — for adults aged 30–79, using age, cholesterol, blood pressure, diabetes, smoking, kidney function and BMI.

Rate 11 common menopause symptoms with the validated Menopause Rating Scale (MRS) and see your overall severity plus somatic, psychological and urogenital scores — a useful summary to take to your doctor.

Find the best times to go to bed or wake up so you wake between 90-minute sleep cycles and feel less groggy.

Add up your daily caffeine from coffee, tea, soda and energy drinks and compare it with the 400 mg/day guideline for healthy adults.

Estimate blood alcohol concentration from drinks, body weight, sex and time with the Widmark formula — for education only, never to decide whether to drive.

Classify a blood pressure reading as normal, elevated, stage 1 or stage 2 hypertension, or a hypertensive crisis using the AHA/ACC guidelines.

Convert blood glucose between mg/dL and mmol/L, and HbA1c to estimated average glucose (eAG) — with the ADA diagnostic ranges.

Calculate your total-to-HDL cholesterol ratio, LDL-to-HDL ratio and non-HDL cholesterol from a lipid panel, in mg/dL or mmol/L.

See how much smoking or vaping costs per week, year and decade — and what that money would grow to if you quit and invested it.

Understand your glasses prescription — SPH, CYL, AXIS and ADD — including whether you're short- or long-sighted, and convert between plus and minus cylinder.

Find your recommended daily fiber intake from your age, sex or calorie intake, based on the US Dietary Guidelines (14 g per 1,000 kcal).

See which blood types can give red cells and plasma to which — ABO and Rh compatibility for transfusions, explained simply.

Guided breathing with an animated circle — box breathing, 4-7-8 relaxation, coherent breathing and more — to calm down, focus or fall asleep.

Check your color vision with a quick online screening — Ishihara-style dot plates for red-green and blue-yellow color blindness, with an instant summary of your results.

Track intermittent fasts — 16:8, 18:6, 20:4, OMAD or custom — with a live timer, eating-window times, fasting stages and a history saved in your browser.

Track daily habits on a simple monthly grid — tap to tick off each day, see current and best streaks, and build routines that stick. Saved in your browser, no sign-up.

Check your hearing with headphones in about 3 minutes — tones from 250 Hz to 8 kHz in each ear, a simple hearing curve and notes on differences between frequencies and ears.

A HIIT and Tabata interval timer with work/rest rounds, sets, a warm-up and audible countdown beeps — for workouts, circuits and boxing rounds.

See average remaining life expectancy for your age and sex in 185 countries, using WHO life tables — the expected age at death, and how it compares before (2019) and after (2021) the pandemic.

Measure your pupillary distance (PD) for ordering glasses online, using a photo of yourself holding a standard bank or ID card for scale. Click the card edges and your pupils — the photo never leaves your device.

Test your reaction time — click as soon as the screen turns green. See your average over 5 tries and how you compare with typical human reaction times.

Estimate your ovulation day and most fertile days from the first day of your last period and your cycle length — for the next three cycles.

Predict your next six periods from the start of your last period, cycle length and period length.

Work backwards from a due date (or last period) to find the likely conception date and the fertile window when conception probably happened.

Calculate hCG doubling time and the percentage rise between two blood test results taken hours or days apart in early pregnancy.

See the recommended total pregnancy weight gain and weekly rate for your pre-pregnancy BMI, for single or twin pregnancies (IOM 2009 guidelines).

Estimate the chances of your baby having brown, green or blue eyes from both parents' eye colors, using a simplified genetics model.

Estimate a child's adult height from the parents' heights with the mid-parental height method, including the typical range.

Estimate how much formula a baby needs per day and per feed from their weight and age — using the common 2.5 oz per pound guideline.

Recommended total sleep, typical naps and awake (wake) windows for babies, toddlers and children by age.

Estimate how many diapers a baby uses and what they cost per month, per year and until potty training.

Compare the yearly cost of daycare, a nanny (with employer taxes) and a nanny share — and see child care as a share of household income.

Suggest a weekly allowance by age and see what it adds up to per month and year — with a save/spend/give split.

Recommended screen time limits for children by age from the American Academy of Pediatrics and WHO, with practical tips.

Find the right car seat stage — rear-facing, forward-facing harness, booster or seat belt — from your child's age, height and weight, following AAP guidance.

Find which school grade or year a child will be in, based on their birthdate and your area's kindergarten age cutoff date.

Convert your dog's or cat's age into human years — by size for dogs — using veterinary guidelines and the 2020 DNA-methylation formula.

Estimate how many calories your dog or cat needs per day — and how many cups of their food — from weight, age and activity, using veterinary RER/MER formulas.

A playful baby gender guess using the traditional Mayan method (mother's age + year of conception) — plus the real odds and when you can actually find out.

Find your baby's or toddler's percentile for weight, length/height and head circumference using the WHO Child Growth Standards (0–5 years) — with z-score and the weights or lengths at the 3rd, 50th and 97th percentiles.

Build a co-parenting custody calendar from common schedules — alternating weeks, 2-2-3, 2-2-5-5, 3-4-4-3 or every other weekend — and see each parent's share of overnights.

Make a printable weekly chore chart with age-appropriate chores for each child — from toddlers putting toys away to teens doing laundry.

Find baby name ideas for girls, boys or gender-neutral — filtered by origin (English, Irish, Italian, Spanish, Arabic, Indian, Japanese and more) and starting letter.

Typical children's shoe sizes by age — US, UK and EU sizes with foot length — from newborn to 12 years, plus how to measure your child's foot.

Estimate your baby's due date from the first day of your last period, the conception date or an IVF transfer date — and see how many weeks pregnant you are.

Log breastfeeding (with a left/right timer), bottles, solids and diapers in one tap — see today's totals, time since the last feed and which side is next, and export a CSV for your pediatrician.

Make a family tree chart from a simple list — couples, birth years and generations — with soft colors per branch. Download a PNG to share or an SVG to print large.

School holiday dates for 30 European countries by state or region — Germany's 16 states, France's zones, Dutch regions, Swiss cantons, Austria and more. Add them to your calendar in one click; links to council dates for the UK.

Convert SAT scores to ACT composites and ACT to SAT using the official concordance tables — with approximate national percentiles to see how a score compares.

Spell out numbers in English words — US or UK style, lakh/crore for South Asia — plus cheque-writing format with cents, for any number up to the quadrillions.

Convert numbers to Roman numerals and Roman numerals back to numbers (1–3,999), with validation of properly formed numerals.

Every percentage question in one place: X% of Y, X is what percent of Y, percentage change, percentage difference, and increasing or decreasing by a percent.

Convert obtained marks into a percentage — for a single exam or a whole result card with several subjects.

Calculate your GPA on a 4.0 scale from letter grades or grade points and credit hours — and your cumulative GPA including previous semesters.

Add, subtract, multiply and divide fractions and mixed numbers, with the answer simplified, as a mixed number and as a decimal.

Paste a list of numbers to get the mean, median, mode, range, sum, standard deviation, variance and quartiles instantly.

A free online scientific calculator — type any expression with trig, logs, powers, roots, factorials, constants and unit-aware maths.

Solve linear and quadratic equations in x — typed naturally like 3x + 5 = 2x - 7 or x^2 - 5x + 6 = 0 — with the discriminant, vertex and real or complex roots.

Solve linear inequalities in x like 3x − 5 < 7 or 2(x + 1) ≥ x − 4, flipping the sign correctly, with the answer in inequality and interval notation.

Differentiate any function of x symbolically — polynomials, trig, exponentials, logs and products — and evaluate the derivative at a point.

Compute definite integrals of any function numerically to high precision, and get the exact antiderivative of polynomials — the area under a curve in seconds.

Find the limit of a function as x approaches a number or infinity — checks the left- and right-hand limits and spots infinite limits and limits that don't exist.

Factor polynomials with integer coefficients — common factors, rational roots, difference of squares and irreducible quadratics — and list all the roots.

Solve any triangle from three known values (SSS, SAS or ASA): all sides, angles, area, perimeter and heights, using the law of sines and cosines.

Find the missing side of a right triangle with a² + b² = c² — the hypotenuse from two legs, or a leg from the hypotenuse and the other leg.

Calculate the area and perimeter of 2D shapes (circle, rectangle, triangle, trapezoid, ellipse, hexagon) and the volume and surface area of 3D solids (sphere, cylinder, cone, box, pyramid).

Find the slope, line equation (y = mx + b), distance, midpoint and angle between two points on a coordinate plane.

Get sin, cos, tan, csc, sec and cot of any angle in degrees or radians — with exact values for special angles and the reference angle and quadrant.

Calculate your current course grade from weighted categories — homework, quizzes, midterm, final — and see the letter grade.

Find the score you need on the final exam to get the course grade you want, given your current grade and how much the final is worth.

Turn points earned into a percentage and letter grade — and see the grade for every number of wrong answers on a test.

Curve a set of test scores — raise the top score to 100, add a flat bonus, or scale to a target average — and see each student's new score.

Calculate unweighted and weighted high school GPA — adding 0.5 for honors and 1.0 for AP/IB courses — from letter grades and credits.

Estimate your UK degree classification — First, 2:1, 2:2 or Third — from your module marks and credits and your university's year weightings.

Convert a word count into pages for essays and manuscripts — by font, size and spacing — or find how many words fit on a number of pages.

Estimate the full cost of a degree — tuition, housing, food, books and other costs with yearly increases — minus scholarships, and plan a monthly student budget.

Find the least common multiple (LCM) and greatest common factor (GCF/GCD) of two or more whole numbers, with their prime factorizations.

Check whether a number is prime and find its prime factorization, all divisors, and the nearest primes above and below.

Calculate powers, square/cube/nth roots (with radical simplification like √72 = 6√2) and logarithms in any base.

Simplify ratios like 12:18 to 2:3, scale a ratio to a total, and solve proportions (a:b = c:x) for the missing value.

Convert decimals to simplified fractions (including repeating decimals like 0.333…) and fractions to decimals with the repeating part marked.

Convert numbers to and from scientific notation (e.g. 0.000452 = 4.52 × 10⁻⁴) and engineering notation, with a chosen number of significant figures.

Round a number to any decimal place or number of significant figures — half up, half even (banker's), always up or always down — and count its sig figs.

Multiply, add and subtract matrices, and find the determinant, inverse, transpose and rank — or solve a system of linear equations Ax = b.

Add, subtract, multiply and divide complex numbers, and convert between rectangular (a + bi) and polar form (r∠θ), with modulus and conjugate.

Add, subtract, multiply and divide numbers in binary, octal or hexadecimal, and do bitwise AND, OR, XOR and shifts — exact for large numbers.

Divide whole numbers with long division and see every step — bring down, divide, multiply, subtract — plus the quotient, remainder and decimal answer.

Generate a times table for any number or a full multiplication grid up to 20 × 20 — ready to print or copy.

Calculate permutations (nPr) and combinations (nCr), with or without repetition, exactly — even for very large numbers.

Convert a value to a z-score and percentile from the mean and standard deviation — or a percentile back to a value — using the normal distribution.

Get the p-value for a z-score, t-statistic or chi-square statistic — one- or two-tailed — and check it against your significance level.

Compare the means of two groups with Welch's t-test (or Student's pooled test) from raw data — t-statistic, degrees of freedom, p-value and mean difference.

Calculate a confidence interval for a mean (from raw data or summary statistics) or for a proportion, at 90%, 95% or 99% confidence.

Fit a least-squares line to x,y data: slope, intercept, equation, R², Pearson correlation coefficient r — and predict y for any x.

Find the value at any percentile of a data set, or the percentile rank of a value — using the same method as Excel's PERCENTILE.INC.

Calculate probabilities of two events — both, either, neither and conditional — plus the chance of at least one success in repeated trials.

Generate printable math practice worksheets — addition, subtraction, multiplication, division or mixed — with your own number ranges and an answer key.

Compare grades across Europe, the UK and the US — ECTS A–F, German 1.0–5.0, French /20, Italian /30, Spanish /10, Dutch /10, UK degree classes and US GPA.

Make flashcards and study them with spaced repetition — flip cards, mark what you know, and focus on the ones you miss. Paste a whole list at once. Free and saved in your browser.

Plot functions online — graph up to six equations at once, zoom and pan, and hover to read values. Supports trig, logs, roots, powers and absolute value. Free and instant.

Practice spelling with words read aloud — load a grade list or paste your own weekly words, type what you hear, and review the words you missed. Great for kids, ESL and spelling bees.

Build Punnett squares for monohybrid and dihybrid crosses (Aa × Aa, AaBb × AaBb) and get genotype and phenotype ratios and probabilities.

Reverse-complement, complement, transcribe and translate DNA or RNA sequences, and get the length, GC content and base counts.

Calculate cell concentration and viability from hemocytometer counts: cells per mL, total cells, and the volume needed to seed a target number of cells.

Calculate the molar mass (molecular weight) of any chemical formula — including brackets and hydrates like CuSO4·5H2O — with the mass percentage of each element.

Balance chemical equations automatically — combustion, redox and precipitation reactions — with the smallest whole-number coefficients.

Searchable periodic table of all 118 elements with atomic number, symbol, name, standard atomic weight and element category.

Calculate molarity, moles, mass or volume of a solution, or solve a dilution with C₁V₁ = C₂V₂.

Calculate pH, pOH, [H⁺] and [OH⁻] from any one of them — or the pH of a weak acid from its concentration and Ka.

Solve the ideal gas law for pressure, volume, moles or temperature — with unit choices for kPa, atm, bar, litres and °C, K or °F.

Calculate how much of a radioactive isotope or drug remains after a given time — or the half-life or time from the amounts — with exponential decay.

Solve density = mass ÷ volume for any of the three, with a list of common material densities for reference.

Find the 'feels like' temperature: heat index from temperature and humidity, or wind chill from temperature and wind speed, using the US National Weather Service formulas.

Calculate the dew point from air temperature and relative humidity — or relative humidity from temperature and dew point — with a comfort rating.

Find sunrise, sunset, solar noon and day length for any location and date from its latitude and longitude.

Find the moon phase, illumination and moon age for any date — plus the dates of the next new moon and full moon.

Find the right air conditioner size in BTU for a room using the ENERGY STAR chart, with adjustments for sun, occupants and kitchens — plus a heating BTU estimate by climate.

Estimate your yearly CO₂ emissions from driving, home electricity, natural gas and flights — with editable emission factors based on US EPA data.

Estimate how much rainwater you can collect from a roof in a storm, a month or a year — in gallons or litres — and the tank size you'd need.

Enter any two of voltage, current, resistance and power to calculate the other two with Ohm's law and the power formulas.

Decode 4, 5 and 6-band resistor color codes into resistance, tolerance and temperature coefficient — or find the bands for a value.

Calculate voltage drop over a copper or aluminum cable run by AWG size, current and length — and find the smallest wire gauge that keeps the drop under 3%.

Convert between watts, amps and volts for DC, single-phase AC and three-phase circuits, including power factor.

Estimate how long a battery will run a device from its capacity (mAh or Wh), the device's current or power draw, and usable capacity.

Find the current-limiting resistor for LEDs (single or in series) with the nearest standard E12 value, or calculate a voltage divider's output.

Calculate capacitive and inductive reactance at a frequency, the LC resonant frequency, and total capacitance or inductance in series and parallel.

Estimate how many solar panels and what system size (kW) you need to cover your electricity use, the yearly savings and the payback period.

Work out the generator size you need from the appliances you want to run — running watts plus the largest motor's starting surge.

Solve constant-acceleration motion problems: enter any three of initial velocity, final velocity, acceleration, time and displacement to get the other two.

Calculate force from mass and acceleration (F = ma), weight on Earth and other planets, kinetic energy and gravitational potential energy.

Calculate the range, maximum height and flight time of a projectile from its launch speed, angle and launch height (no air resistance).

Calculate torque from force and lever arm, and a gear train's ratio, output speed and output torque from the tooth counts.

Calculate flow rate from pipe diameter and velocity (or velocity from flow), in L/min, GPM and m³/h, plus the Reynolds number for water.

Calculate how far sound or light travels in a given time — including how far away lightning is from the delay before thunder — with sound speed adjusted for air temperature.

Convert between frequency and wavelength for radio, light and sound waves — plus photon energy for electromagnetic waves.

Add sound levels in decibels, find the difference between two levels as a ratio, and convert between dB and power or amplitude ratios.

Compare earthquakes by magnitude: the energy released, the TNT equivalent and how many times stronger one quake is than another.

Convert real-world sizes to model sizes and back for any scale — 1:24, 1:43, 1:87 (HO), 1:160 (N) and more — in mm, cm or inches.

Estimate the cost of a 3D print from filament used, filament price, print time, printer power and machine wear — plus a selling price with markup.

See where the Sun, Moon and planets are in your sky right now or at any date and time — altitude, compass direction, constellation, brightness, and rise and set times — plus the Moon's phase.

Calculate maximum deflection, bending moment, stress and reactions for simply supported and cantilever beams with point or uniform loads — rectangular sections in wood, steel or aluminum.

Find the ISO week number, day of the week, day of the year and quarter for any date — and the dates of any week number.

How many days until Christmas, New Year, Easter, Halloween, Thanksgiving, Valentine's Day, Mother's Day and more — or a countdown to any date you choose.

List US federal holidays (with observed dates) and England & Wales bank holidays for any year — calculated from the official rules.

Show a month calendar for any month and year, starting on Sunday or Monday, with ISO week numbers — ready to print or download as CSV.

Find your half birthday, how long you've been together, your next anniversary and the traditional anniversary gift for each year.

Convert between 12-hour and 24-hour (military) time, and between hours:minutes and decimal hours for timesheets (1:45 = 1.75).

Convert a calendar date to the astronomical Julian Day Number, Modified Julian Date and the ordinal 'Julian date' (YYDDD / day of year) used in manufacturing and the military.

Find your Western star sign from your birth date and your Chinese zodiac animal and element from your birth year.

Find which generation you belong to — Boomer, Gen X, Millennial, Gen Z, Gen Alpha or Beta — from your birth year, with each generation's year range.

Find the date you'll reach retirement age — any age you choose or your US Social Security full retirement age — and how long there is to go.

Check how many days you've spent in the Schengen Area in the last 180 days, how many you have left, and the latest date you can stay on your next trip.

Plan how to shift your sleep before and after a flight across time zones — how many days jet lag may last and a day-by-day bedtime schedule.

Check whether a year is a leap year, and find the dates of the March and September equinoxes and June and December solstices — the astronomical start of each season.

List every payday for the year from your first pay date and pay frequency, and spot the months with three biweekly paychecks.

Calculate exact age in years, months and days from a date of birth — plus total days lived, the next birthday and the day you were born.

Count the days, weeks, months and years between two dates, including or excluding the end date, and the number of business days.