# FreeToolCabin > FreeToolCabin (https://freetoolcabin.com) is a free collection of 4,316 online tools: PDF and image tools, unit converters, calculators, text and developer tools, audio/video tools, device tests and games. Every tool runs in the browser: files and data are processed on the user's device and are not uploaded. No sign-up. Calculators show the formula and a worked example with the user's numbers. Figures that change over time (tax brackets, limits, fees) are labelled with the year they apply to. Testing process: https://freetoolcabin.com/how-we-test/ ## Categories - [PDF Tools](https://freetoolcabin.com/pdf-tools/): 206 tools - [PDF Converters](https://freetoolcabin.com/pdf-tools/convert-pdf/): Convert PDF to Word, Excel, JPG, text and back, plus EPUB, PowerPoint and other document formats. - [Edit & Organize PDF](https://freetoolcabin.com/pdf-tools/edit-organize-pdf/): Merge, split, compress, rotate, crop, sign, protect, watermark and edit PDF files. - [Document Makers & Templates](https://freetoolcabin.com/pdf-tools/document-templates/): Create invoices, resumes, letters, forms, certificates and other documents as PDF. - [Image Tools](https://freetoolcabin.com/image-tools/): 368 tools - [Image Converters](https://freetoolcabin.com/image-tools/convert-images/): Convert JPG, PNG, WebP, HEIC, AVIF, SVG, GIF, TIFF and other image formats. - [Resize, Crop & Compress](https://freetoolcabin.com/image-tools/edit-resize-compress/): Resize, crop, compress, rotate, flip and optimize images. - [Photo Effects & Editing](https://freetoolcabin.com/image-tools/effects-filters/): Filters, effects, blur, background removal, color adjustments, text and drawing on photos. - [Design & Graphics Makers](https://freetoolcabin.com/image-tools/design-makers/): Make logos, banners, cards, posters, thumbnails, social graphics, avatars and mockups. - [Color Tools](https://freetoolcabin.com/image-tools/color-tools/): Color pickers, palettes, converters, contrast checkers and color names. - [Printables & Worksheets](https://freetoolcabin.com/image-tools/printables/): Printable charts, worksheets, labels, planners, paper and templates. - [Other Image Tools](https://freetoolcabin.com/image-tools/image-utilities/): More handy image utilities. - [Unit Converters](https://freetoolcabin.com/unit-converters/): 366 tools - [Length & Distance Converters](https://freetoolcabin.com/unit-converters/length-distance/): Convert inches, feet, meters, miles, kilometers and other length and distance units. - [Weight & Mass Converters](https://freetoolcabin.com/unit-converters/weight-mass/): Convert kilograms, pounds, ounces, grams, stones, tons and other weight units. - [Volume & Capacity Converters](https://freetoolcabin.com/unit-converters/volume-capacity/): Convert liters, gallons, cups, quarts, milliliters, cubic units and other volume units. - [Cooking Measurement Converters](https://freetoolcabin.com/unit-converters/cooking-measurements/): Convert cups to grams, sticks of butter, flour, sugar and other baking and cooking measurements. - [Temperature, Energy & Power Converters](https://freetoolcabin.com/unit-converters/temperature-energy-power/): Convert Celsius, Fahrenheit, joules, calories, watts, horsepower, BTU and kWh. - [Pressure, Force & Torque Converters](https://freetoolcabin.com/unit-converters/pressure-force-torque/): Convert psi, bar, kPa, atm, newton meters, foot pounds and other pressure and torque units. - [Speed, Flow & Time Converters](https://freetoolcabin.com/unit-converters/speed-flow-time/): Convert mph, km/h, knots, gpm, cfm, seconds, minutes, hours, days and other rate units. - [Area, Angle & Density Converters](https://freetoolcabin.com/unit-converters/area-angle-density/): Convert square feet, acres, hectares, degrees, radians, density and other area and angle units. - [Data & Digital Converters](https://freetoolcabin.com/unit-converters/digital-data/): Convert bytes, KB, MB, GB, TB, bits, Mbps and other digital storage and data-rate units. - [Fuel Economy & Other Converters](https://freetoolcabin.com/unit-converters/fuel-economy-misc/): Convert mpg, L/100km, shoe sizes, clothing sizes, currencies and other specialty units. - [Calculators](https://freetoolcabin.com/calculators/): 1480 tools - [Loan & Mortgage Calculators](https://freetoolcabin.com/calculators/loans-mortgages/): Payments, amortization, refinancing, affordability and payoff calculators for mortgages, car loans, student loans and credit cards. - [Tax & Paycheck Calculators](https://freetoolcabin.com/calculators/taxes-paychecks/): Income tax, paycheck, salary, hourly wage, overtime and payroll calculators. - [Investing & Retirement Calculators](https://freetoolcabin.com/calculators/investing-retirement/): Compound interest, savings growth, stock, crypto, dividend and retirement planning calculators. - [Business & Marketing Calculators](https://freetoolcabin.com/calculators/business-marketing/): Profit, margin, pricing, startup, e-commerce fee, marketing ROI and business metric calculators. - [Personal Finance & Budget Calculators](https://freetoolcabin.com/calculators/personal-finance/): Budget, savings goal, split-the-bill, cost of living, insurance and everyday money calculators. - [Pregnancy & Baby Calculators](https://freetoolcabin.com/calculators/pregnancy-baby/): Due date, ovulation, pregnancy week, baby growth and parenting calculators. - [Pet & Animal Calculators](https://freetoolcabin.com/calculators/pets-animals/): Dog, cat, horse and livestock age, food, weight and care calculators. - [Nutrition & Diet Calculators](https://freetoolcabin.com/calculators/nutrition-diet/): Calorie, macro, protein, carb, water intake and diet planning calculators. - [Fitness & Sports Calculators](https://freetoolcabin.com/calculators/fitness-sports/): Running pace, one-rep max, training zones, sports scores and workout calculators. - [Health & Body Calculators](https://freetoolcabin.com/calculators/health-body/): BMI, body fat, ideal weight, sleep, blood pressure and general health calculators. - [Statistics & Probability Calculators](https://freetoolcabin.com/calculators/statistics-probability/): Mean, standard deviation, confidence interval, hypothesis test, regression and probability calculators. - [Geometry & Trigonometry Calculators](https://freetoolcabin.com/calculators/geometry-trigonometry/): Area, volume, perimeter, triangle, circle, angle and trigonometry calculators. - [Algebra & Calculus Calculators](https://freetoolcabin.com/calculators/algebra-calculus/): Equation solvers, derivatives, integrals, limits, matrices, series and advanced math calculators. - [Education & Grade Calculators](https://freetoolcabin.com/calculators/education/): GPA, grade, test score, study time and school calculators. - [Arithmetic & Number Calculators](https://freetoolcabin.com/calculators/arithmetic-numbers/): Percentage, fraction, ratio, rounding, number and basic math calculators. - [Electrical & Electronics Calculators](https://freetoolcabin.com/calculators/electrical-electronics/): Ohm's law, voltage drop, wire size, resistor, capacitor, battery and circuit calculators. - [Physics Calculators](https://freetoolcabin.com/calculators/physics/): Force, motion, energy, momentum, waves, optics and relativity calculators. - [Chemistry & Biology Calculators](https://freetoolcabin.com/calculators/chemistry-biology/): Molarity, moles, stoichiometry, pH, gas law, dilution, genetics and lab calculators. - [Astronomy, Weather & Earth Calculators](https://freetoolcabin.com/calculators/astronomy-earth/): Planets, stars, telescope, sun position, weather index and earth science calculators. - [Engineering & Machining Calculators](https://freetoolcabin.com/calculators/engineering/): Structural, mechanical, civil, fluid, machining and manufacturing calculators. - [Auto & Travel Calculators](https://freetoolcabin.com/calculators/auto-travel/): Gas mileage, fuel cost, car ownership, tire, driving and trip calculators. - [Food & Cooking Calculators](https://freetoolcabin.com/calculators/food-cooking/): Recipe, baking, cooking time, meat, coffee and kitchen calculators. - [Garden, Lawn & Farm Calculators](https://freetoolcabin.com/calculators/garden-outdoors/): Garden, lawn, soil, mulch, plant spacing, irrigation and farm calculators. - [Home & Construction Calculators](https://freetoolcabin.com/calculators/home-construction/): Concrete, paint, flooring, tile, roofing, lumber, drywall and home improvement calculators. - [Everyday Calculators](https://freetoolcabin.com/calculators/everyday/): Age, date, time, size, conversion helpers and other handy everyday calculators. - [Time & Date](https://freetoolcabin.com/time-date/): 275 tools - [Timers & Countdowns](https://freetoolcabin.com/time-date/timers-countdowns/): Online timers, countdowns to holidays and events, stopwatches and interval timers. - [Time Zones & World Clocks](https://freetoolcabin.com/time-date/world-clock-time-zones/): Time zone converters, current time in cities, UTC/GMT and world clock tools. - [Calendars & Planners](https://freetoolcabin.com/time-date/calendars-planners/): Printable calendars, planners, schedules, holiday lists and calendar tools. - [Date Calculators](https://freetoolcabin.com/time-date/date-calculators/): Days between dates, add or subtract days, age, business days and other date calculators. - [Time Calculators](https://freetoolcabin.com/time-date/time-calculators/): Hours, minutes, time math, time cards, sleep and work-hour calculators. - [Sun, Moon & Sky Times](https://freetoolcabin.com/time-date/sun-moon-astronomy/): Sunrise, sunset, moon phase, golden hour and astronomical time tools. - [Text Tools](https://freetoolcabin.com/text-tools/): 459 tools - [Fonts, Symbols & Emoji](https://freetoolcabin.com/text-tools/fonts-symbols/): Fancy fonts, Unicode text styles, symbols, emoji and special character tools. - [Online Keyboards & Languages](https://freetoolcabin.com/text-tools/keyboards-languages/): Virtual keyboards for many languages, transliteration and language tools. - [Writing & Idea Generators](https://freetoolcabin.com/text-tools/writing-generators/): Generators for names, captions, bios, slogans, poems, stories, prompts and other writing ideas. - [Letter & Message Generators](https://freetoolcabin.com/text-tools/letters-messages/): Write letters, emails, wishes, greetings, speeches and other messages from ready templates. - [Social Media Text Tools](https://freetoolcabin.com/text-tools/social-media/): Character counters, formatters and text tools for Instagram, TikTok, X, YouTube and more. - [Text Counters & Analyzers](https://freetoolcabin.com/text-tools/counters-analyzers/): Word, character, sentence and readability counters plus text analysis tools. - [Text Cleaning & Formatting](https://freetoolcabin.com/text-tools/cleaning-formatting/): Remove spaces, line breaks and duplicates, change case, sort, wrap and format text. - [Ciphers & Encoding](https://freetoolcabin.com/text-tools/encoding-ciphers/): Classic ciphers, codes, secret messages and text encoders. - [Other Text Tools](https://freetoolcabin.com/text-tools/text-utilities/): More handy text utilities. - [Developer Tools](https://freetoolcabin.com/developer-tools/): 505 tools - [Code Formatters & Validators](https://freetoolcabin.com/developer-tools/formatters-validators/): Beautify, minify, validate and lint JSON, HTML, CSS, JavaScript, SQL, XML, YAML and more. - [Data & File Format Converters](https://freetoolcabin.com/developer-tools/data-converters/): Convert between JSON, CSV, XML, YAML, TOML, SQL, Excel and other data formats. - [Code Generators & Builders](https://freetoolcabin.com/developer-tools/code-generators/): Generate code, classes, types, regex, configs, schema, boilerplate and mock data. - [Encoders, Hashes & Crypto](https://freetoolcabin.com/developer-tools/encoders-hashes/): Base64, URL, HTML entity encoders, hash generators, JWT, UUID decoders and crypto tools. - [Web, HTML & CSS Tools](https://freetoolcabin.com/developer-tools/web-css-design/): CSS generators, HTML tools, color, layout, animation and front-end design helpers. - [SEO & Marketing Tools](https://freetoolcabin.com/developer-tools/seo-marketing/): Meta tags, schema markup, SERP preview, sitemap, robots.txt, UTM and SEO helpers. - [Network, DNS & Email Tools](https://freetoolcabin.com/developer-tools/network-dns/): DNS lookups, IP and subnet calculators, HTTP headers, email authentication and network tools. - [Code Playgrounds & Testers](https://freetoolcabin.com/developer-tools/testers-playgrounds/): Run and test code online: regex, JavaScript, Python, SQL, JSON path, XPath and more. - [Audio & Video](https://freetoolcabin.com/audio-video/): 266 tools - [Audio Converters & Editors](https://freetoolcabin.com/audio-video/audio-converters-editors/): Convert, cut, join, compress and edit MP3, WAV, M4A, OGG, FLAC and other audio. - [Video Converters & Editors](https://freetoolcabin.com/audio-video/video-tools/): Convert, trim, compress, resize and edit MP4, MOV, WebM, AVI, GIF and other videos. - [Music Theory & Instruments](https://freetoolcabin.com/audio-video/music-instruments/): Tuners, metronomes, virtual instruments, chords, scales and ear training. - [Sound & Noise Generators](https://freetoolcabin.com/audio-video/sound-generators/): White, pink and brown noise, tones, binaural beats, ambient sounds and test tones. - [Device & Internet Tests](https://freetoolcabin.com/device-tests/): 129 tools - [Screen & Display Tests](https://freetoolcabin.com/device-tests/display-tests/): Dead pixel, refresh rate, color, monitor calibration and screen test tools. - [Keyboard, Mouse & Controller Tests](https://freetoolcabin.com/device-tests/input-device-tests/): Keyboard, mouse, click speed, gamepad, touch and input device tests. - [Mic, Speaker & Camera Tests](https://freetoolcabin.com/device-tests/audio-camera-tests/): Microphone, speaker, headphone, webcam and video call tests. - [Network, Browser & System Tests](https://freetoolcabin.com/device-tests/network-system-tests/): Internet speed, IP, browser, battery, sensors and system information tests. - [Skill & Brain Tests](https://freetoolcabin.com/device-tests/skill-tests/): Reaction time, memory, typing and other skill tests. - [Fun & Games](https://freetoolcabin.com/fun/): 262 tools - [Online Games](https://freetoolcabin.com/fun/games/): Free puzzle, card, board, word and arcade games that play in your browser. - [Random Generators & Pickers](https://freetoolcabin.com/fun/random-pickers/): Wheels, coin flips, dice, random names, numbers and other randomizers. - [Quizzes & Personality](https://freetoolcabin.com/fun/quizzes-personality/): Fun quizzes, zodiac, numerology, personality and compatibility tools. - [Party & Fun Tools](https://freetoolcabin.com/fun/party-fun/): Party games, ideas, name generators and just-for-fun tools. ## Most popular tools - [Merge PDF](https://freetoolcabin.com/merge-pdf/): Combine several PDF files into one document. - [Compress PDF](https://freetoolcabin.com/compress-pdf/): Reduce PDF file size while keeping it readable. - [JPG to PDF](https://freetoolcabin.com/jpg-to-pdf/): Combine JPG photos into one PDF with page size, margins and orientation options. - [PowerPoint to PDF](https://freetoolcabin.com/powerpoint-to-pdf/): Convert PPTX slides to PDF, one page per slide at the original slide size. Batch files, no upload. - [Protect PDF with Password](https://freetoolcabin.com/protect-pdf/): Lock a PDF with a password and AES-256 encryption, and restrict printing, copying or editing. - [Unlock PDF](https://freetoolcabin.com/unlock-pdf/): Remove the password and print, copy or edit restrictions from a PDF you have the password for. - [OCR PDF](https://freetoolcabin.com/ocr-pdf/): Make scanned PDFs searchable and copyable with OCR in 70+ languages, or export the text. - [PDF to Word](https://freetoolcabin.com/pdf-to-word/): Convert PDF files to editable Word documents. - [PDF to Excel](https://freetoolcabin.com/pdf-to-excel/): Extract tables from PDF files into an Excel spreadsheet (XLSX) or CSV, right in your browser. - [PDF to JPG](https://freetoolcabin.com/pdf-to-jpg/): Turn PDF pages into high-quality JPG images. - [PDF to PNG](https://freetoolcabin.com/pdf-to-png/): Convert PDF pages to PNG images with custom DPI and transparent background. - [Word to PDF](https://freetoolcabin.com/word-to-pdf/): Convert Word DOCX documents to PDF. - [Image to PDF](https://freetoolcabin.com/image-to-pdf/): Convert JPG, PNG, WEBP and more into a PDF. - [Split PDF](https://freetoolcabin.com/split-pdf/): Extract pages or split a PDF into separate files. - [Delete PDF Pages](https://freetoolcabin.com/delete-pdf-pages/): Remove pages from a PDF using a visual thumbnail grid. - [Rotate PDF](https://freetoolcabin.com/rotate-pdf/): Rotate one page or all pages of a PDF by 90, 180 or 270 degrees. - [Add Page Numbers to PDF](https://freetoolcabin.com/add-page-numbers-to-pdf/): Number PDF pages with your choice of position, format and font. - [Watermark PDF](https://freetoolcabin.com/watermark-pdf/): Stamp a text or logo watermark on PDF pages with custom opacity. - [Invoice Generator](https://freetoolcabin.com/invoice-generator/): Create professional invoices and save them as PDF. - [Background Remover](https://freetoolcabin.com/background-remover/): Remove image backgrounds automatically with AI. - [Photo Enhancer](https://freetoolcabin.com/photo-enhancer/): One-click auto enhance: fix exposure, contrast, color cast and sharpness, one photo or a batch. - [Remove Object from Photo](https://freetoolcabin.com/remove-object-from-photo/): Brush over unwanted objects, people or text and fill the area with matching background. - [Make Image Transparent](https://freetoolcabin.com/make-image-transparent/): Remove a white or solid-color background and save a transparent PNG, right in your browser. - [Image to Text (OCR)](https://freetoolcabin.com/image-to-text/): Extract text from images, screenshots and photos with OCR in 25+ languages, right in your browser. - [Photo to Cartoon](https://freetoolcabin.com/photo-to-cartoon/): Turn photos into cartoons with smooth colors and bold outlines. Free, private, no upload. - [PSD to PNG](https://freetoolcabin.com/psd-to-png/): Convert Photoshop PSD files to PNG and export every layer as its own PNG, no Photoshop needed. - [Image Compressor](https://freetoolcabin.com/image-compressor/): Shrink images to a target size like 100 KB. - [Image Resizer](https://freetoolcabin.com/image-resizer/): Resize images to any size without losing quality. - [Compress Image to 20KB](https://freetoolcabin.com/compress-image-to-20kb/): Shrink any photo to under 20KB (or any target size). - [Compress Image to 100KB](https://freetoolcabin.com/compress-image-to-100kb/): Shrink any photo to under 100KB automatically, with the best quality that fits. - [Compress JPEG to 50KB](https://freetoolcabin.com/compress-jpeg-to-50kb/): Shrink photos to under 50KB for forms, passports and exams. - [HEIC to JPG](https://freetoolcabin.com/heic-to-jpg/): Convert iPhone HEIC photos to JPG. - [WEBP to JPG](https://freetoolcabin.com/webp-to-jpg/): Convert WEBP images to JPG in bulk. - [PNG to JPG](https://freetoolcabin.com/png-to-jpg/): Batch convert PNG images to JPG with a background color. - [JPG to PNG](https://freetoolcabin.com/jpg-to-png/): Batch convert JPG images to PNG. - [Image Cropper](https://freetoolcabin.com/image-cropper/): Crop images, including circle crops for profile pictures. - [Rotate & Flip Image](https://freetoolcabin.com/rotate-flip-image/): Rotate images by any angle or mirror them, one or many at once. - [Meme Generator](https://freetoolcabin.com/meme-generator/): Make memes with classic templates and custom text. - [Collage Maker](https://freetoolcabin.com/collage-maker/): Combine photos into a grid collage. - [Add Watermark to Photo](https://freetoolcabin.com/image-watermark/): Add a text or logo watermark to one or many photos at once. - [Blur Image & Face Pixelate Tool](https://freetoolcabin.com/blur-image/): Blur or pixelate faces, plates and backgrounds in a photo. - [Pixelate Image & Pixel Art Converter](https://freetoolcabin.com/pixelate-image/): Turn any picture into pixel art with retro palettes and dithering. - [Logo Maker](https://freetoolcabin.com/logo-maker/): Design a text logo with fonts, icons and colors, then save SVG or PNG. - [Certificate Maker](https://freetoolcabin.com/certificate-maker/): Design certificates from templates and export one or many as PDF. - [WEBP to PNG](https://freetoolcabin.com/webp-to-png/): Convert WEBP images to PNG, keeping transparency. - [SVG to PNG](https://freetoolcabin.com/svg-to-png/): Convert SVG graphics to PNG or JPEG at any scale. - [PNG to ICO](https://freetoolcabin.com/png-to-ico/): Create multi-size favicon .ico files from PNG. - [GIF Maker](https://freetoolcabin.com/gif-maker/): Turn videos and images into GIFs, trim and compress. - [Business Card Maker](https://freetoolcabin.com/business-card-maker/): Design business cards and download a print-ready PDF. - [Flyer Maker](https://freetoolcabin.com/flyer-maker/): Design printable and social media flyers from free templates. - [Poster Maker](https://freetoolcabin.com/poster-maker/): Design posters in A0–A5 and US sizes and download a print-ready PDF. - [Invitation Card Maker](https://freetoolcabin.com/invitation-maker/): Create printable birthday, wedding and party invitations for free. - [Color Palette Generator](https://freetoolcabin.com/color-palette-generator/): Generate beautiful color palettes and export them. - [HEX to RGB](https://freetoolcabin.com/hex-to-rgb/): Convert HEX colors to RGB and other formats. - [RGB to HEX](https://freetoolcabin.com/rgb-to-hex/): Convert RGB to HEX with sliders, live swatch and one-click copy. - [HEX to HSL](https://freetoolcabin.com/hex-to-hsl/): Convert HEX colors to HSL and back with interactive sliders. - [RGB to CMYK Converter](https://freetoolcabin.com/rgb-to-cmyk/): Convert RGB and HEX colors to CMYK for print, and back. - [Color Contrast Checker](https://freetoolcabin.com/color-contrast-checker/): Check WCAG contrast ratios and find accessible text colors. - [Pantone to HEX](https://freetoolcabin.com/pantone-to-hex/): Look up approximate HEX, RGB and CMYK values for Pantone colors. - [Color Name Finder](https://freetoolcabin.com/color-name-finder/): Find the closest color name for any HEX or RGB color. - [AVIF to JPG](https://freetoolcabin.com/avif-to-jpg/): Convert AVIF images to widely supported JPG. - [PNG & JPG to WEBP](https://freetoolcabin.com/webp-converter/): Convert PNG and JPG images to smaller WEBP files. - [Aspect Ratio Calculator](https://freetoolcabin.com/aspect-ratio-calculator/): Calculate image sizes for 16:9, 4:3 and any ratio. - [Thumbnail Safe Zone](https://freetoolcabin.com/thumbnail-safe-zone/): Preview YouTube and TikTok thumbnail safe zones. - [Currency Converter](https://freetoolcabin.com/currency-converter/): Convert currencies with live exchange rates. - [Temperature Converter](https://freetoolcabin.com/temperature-converter/): Convert °C, °F, K, °R and °Ré at once. Type in any field, with formulas and a range table. - [KG to LBS](https://freetoolcabin.com/kg-to-lbs/): Convert kilograms to pounds and back. - [CM to Feet](https://freetoolcabin.com/cm-to-feet/): Convert centimeters to feet and back. - [CM to Inches](https://freetoolcabin.com/cm-to-inches/): Convert centimeters to inches and back. - [Inches to Feet](https://freetoolcabin.com/inches-to-feet/): Convert inches to feet (in to ft) instantly, with formula and chart. - [Celsius to Fahrenheit](https://freetoolcabin.com/celsius-to-fahrenheit/): Convert temperatures between °C and °F. - [Fahrenheit to Celsius](https://freetoolcabin.com/fahrenheit-to-celsius/): Convert temperatures from °F to °C and back. - [ML to OZ](https://freetoolcabin.com/ml-to-oz/): Convert milliliters to US or UK fluid ounces. - [OZ to ML](https://freetoolcabin.com/oz-to-ml/): Convert fluid ounces to milliliters and back. - [Height to CM](https://freetoolcabin.com/height-to-cm/): Convert height in feet and inches to centimeters. - [LBS to KG](https://freetoolcabin.com/lbs-to-kg/): Convert pounds to kilograms and back. - [Inches to CM](https://freetoolcabin.com/inches-to-cm/): Convert inches, including fractions, to centimeters. - [MPH to km/h](https://freetoolcabin.com/mph-to-kmh/): Convert miles per hour to kilometers per hour. - [Square Feet to Square Meters](https://freetoolcabin.com/square-feet-to-square-meters/): Convert ft² to m² and back, with a room area helper. - [Watts to Amps](https://freetoolcabin.com/watts-to-amps/): Convert watts to amps at any voltage, DC or AC. - [Mbps to MB per Second](https://freetoolcabin.com/mbps-to-mb-per-second/): Convert internet speed from Mbps to MB/s and back. - [KM to Miles](https://freetoolcabin.com/km-to-miles/): Convert kilometers to miles. - [Miles to KM](https://freetoolcabin.com/miles-to-km/): Convert miles to kilometers. - [Feet to Meters](https://freetoolcabin.com/feet-to-meters/): Convert feet to meters and back. - [Meters to Feet](https://freetoolcabin.com/meters-to-feet/): Convert meters to feet and back. - [Unit Converter](https://freetoolcabin.com/unit-converter/): Convert length, weight, volume, temperature and more. - [Roman Numeral Converter](https://freetoolcabin.com/roman-numeral-converter/): Convert numbers to Roman numerals and back, up to 3,999,999. - [Number to Words](https://freetoolcabin.com/number-to-words/): Write any number in words, including cheque format. - [Words to Number](https://freetoolcabin.com/words-to-number/): Convert written English number words back into digits. - [Number Base Converter](https://freetoolcabin.com/number-base-converter/): Convert numbers between any bases from 2 to 36, with fractions and steps. - [Ordinal Number Generator](https://freetoolcabin.com/ordinal-number-generator/): Turn numbers or ranges into ordinals like 1st, 2nd, 3rd or first. - [Time Zone Abbreviations & UTC Offsets](https://freetoolcabin.com/time-zone-abbreviations/): Look up time zone abbreviations like EST, CET or IST and their UTC offsets. - [Percentage Calculator](https://freetoolcabin.com/percentage-calculator/): Work out percentages, increases and decreases. - [Income Tax Calculator](https://freetoolcabin.com/income-tax-calculator/): Estimate US federal income tax after deductions and credits, with effective and marginal rate. - [Mortgage Calculator](https://freetoolcabin.com/mortgage-calculator/): Monthly mortgage payment with taxes, insurance, PMI and HOA, plus a yearly amortization schedule. - [Social Security Benefits Calculator](https://freetoolcabin.com/social-security-calculator/): Estimate your monthly Social Security benefit and compare claiming at 62, full age or 70. - [GST Calculator](https://freetoolcabin.com/gst-calculator/): Add or remove GST at any rate, with India CGST/SGST split and AU, NZ and Canada presets. - [EMI Calculator](https://freetoolcabin.com/emi-calculator/): Monthly EMI, total interest and month-by-month schedule, reducing or flat rate. - [SIP Calculator](https://freetoolcabin.com/sip-calculator/): Maturity value, invested amount and returns of a monthly SIP, with optional annual step-up. - [Reverse Sales Tax Calculator](https://freetoolcabin.com/reverse-sales-tax-calculator/): Back out sales tax from a total: pre-tax price and tax amount, one total or a whole list. - [PMI Calculator](https://freetoolcabin.com/pmi-calculator/): Monthly PMI, loan-to-value and the month PMI drops off at 80% or 78% LTV. - [Capital Gains Calculator](https://freetoolcabin.com/capital-gains-calculator/): Gain or loss on a sale, short- or long-term tax at your rates, net proceeds and return. - [Percentage Change Calculator](https://freetoolcabin.com/percentage-change-calculator/): Percent increase or decrease between two values, and reverse. - [Percentage Difference Calculator](https://freetoolcabin.com/percentage-difference-calculator/): Find the percent difference between two values, with the formula. - [Tip Calculator](https://freetoolcabin.com/tip-calculator/): Work out the tip and split the bill between any number of people. - [Discount Calculator](https://freetoolcabin.com/discount-calculator/): Sale price, percent off, stacked discounts and sales tax. - [Profit Margin Calculator](https://freetoolcabin.com/profit-margin-calculator/): Gross margin, markup, cost or price: solve for any one, single or bulk. - [Salary to Hourly Calculator](https://freetoolcabin.com/salary-to-hourly-calculator/): Convert hourly, weekly, monthly and yearly pay, with overtime. - [Age Calculator](https://freetoolcabin.com/age-calculator/): Find your exact age and next birthday countdown. - [Pregnancy Due Date Calculator](https://freetoolcabin.com/due-date-calculator/): Find your due date and how many weeks pregnant you are. - [Ovulation Calculator](https://freetoolcabin.com/ovulation-calculator/): Estimate ovulation and fertile days for the next 6 months. - [BMI Calculator](https://freetoolcabin.com/bmi-calculator/): Calculate BMI and a healthy weight range. - [TDEE Calorie Calculator](https://freetoolcabin.com/tdee-calculator/): Find maintenance calories, calories to lose weight and macros. - [BMR Calculator](https://freetoolcabin.com/bmr-calculator/): Calculate basal metabolic rate with three formulas and daily calories. - [Loan Calculator](https://freetoolcabin.com/loan-calculator/): Monthly payments and amortization for loans and mortgages. - [Mortgage Refinance Calculator](https://freetoolcabin.com/mortgage-refinance-calculator/): Compare your current and new mortgage, break-even month and savings. - [Extra Mortgage Payment Calculator](https://freetoolcabin.com/extra-mortgage-payment-calculator/): See how extra payments cut your mortgage term and interest. - [Compound Interest Calculator](https://freetoolcabin.com/compound-interest-calculator/): See how savings and investments grow over time. - [Square Footage Calculator](https://freetoolcabin.com/square-footage-calculator/): Total sq ft and m² for rooms of any shape, with cost estimate. - [One Rep Max Calculator](https://freetoolcabin.com/one-rep-max-calculator/): Estimate your 1RM with Epley and Brzycki, plus a percentage table. - [Weighted Average Calculator](https://freetoolcabin.com/weighted-average-calculator/): Calculate a weighted mean from values and weights, step by step. - [Macro Calculator](https://freetoolcabin.com/macro-calculator/): Daily protein, carb and fat targets for your calorie goal. - [Protein Intake Calculator](https://freetoolcabin.com/protein-intake-calculator/): Find how much protein you need per day and per meal. - [Ratio Calculator](https://freetoolcabin.com/ratio-calculator/): Simplify, solve and scale ratios with step-by-step working. - [Proportion Calculator](https://freetoolcabin.com/proportion-calculator/): Solve A/B = C/D for x with cross multiplication steps. - [Rent vs Buy Calculator](https://freetoolcabin.com/rent-vs-buy-calculator/): Compare the long-run cost of renting versus buying a home. - [401(k) Calculator](https://freetoolcabin.com/401k-calculator/): Project your 401(k) balance with employer match and growth. - [Scientific Calculator](https://freetoolcabin.com/scientific-calculator/): Trig, logs, powers and more in your browser. - [Average Calculator](https://freetoolcabin.com/average-calculator/): Mean, weighted average, median, sum, min and max of any list. - [Standard Deviation Calculator](https://freetoolcabin.com/standard-deviation-calculator/): Standard deviation, variance, mean, median, mode and quartiles. - [Receipt Maker](https://freetoolcabin.com/receipt-maker/): Fill in a receipt template with items and tax, then print or save PDF. - [Ohm's Law Calculator](https://freetoolcabin.com/ohms-law-calculator/): Solve voltage, current, resistance and power from any two values. - [Resistor Color Code Calculator](https://freetoolcabin.com/resistor-color-code-calculator/): Read 4, 5 and 6 band resistor colors, or find colors for a value. - [Dog Age Calculator](https://freetoolcabin.com/dog-age-calculator/): Convert dog years to human years by size. - [Running Pace Calculator](https://freetoolcabin.com/running-pace-calculator/): Calculate pace and predict race times. - [Cat Age Calculator](https://freetoolcabin.com/cat-age-calculator/): Convert cat years to human years. - [Fuel Cost Calculator](https://freetoolcabin.com/fuel-cost-calculator/): Work out trip fuel costs and split them. - [Electricity Cost Calculator](https://freetoolcabin.com/electricity-cost-calculator/): Estimate kWh usage and electricity costs. - [Concrete Calculator](https://freetoolcabin.com/concrete-calculator/): Estimate concrete volume, bags and cost. - [Recipe Scaler](https://freetoolcabin.com/recipe-scaler/): Scale recipe ingredients to any number of servings. - [Sleep Calculator](https://freetoolcabin.com/sleep-calculator/): Find the best bedtime or wake-up time using 90-minute sleep cycles. - [VAT Calculator](https://freetoolcabin.com/vat-calculator/): Add or remove VAT and sales tax with country rate presets. - [Car Loan Calculator](https://freetoolcabin.com/car-loan-calculator/): Monthly car payment with down payment, trade-in, APR and amortization. - [Mortgage Affordability Calculator](https://freetoolcabin.com/mortgage-affordability-calculator/): How much house you can afford from income, debts and DTI limits. - [GPA Calculator](https://freetoolcabin.com/gpa-calculator/): Weighted and unweighted GPA by semester, plus cumulative GPA. - [Body Fat Calculator](https://freetoolcabin.com/body-fat-calculator/): Body fat % with the US Navy and BMI methods, lean vs fat mass. - [Fraction Calculator](https://freetoolcabin.com/fraction-calculator/): Add, subtract, multiply and divide fractions with steps. - [Graphing Calculator](https://freetoolcabin.com/graphing-calculator/): Plot multiple functions with zoom, pan, intersections and a value table. - [Retirement Calculator](https://freetoolcabin.com/retirement-calculator/): Project retirement savings and see your shortfall or surplus. - [Savings Goal Calculator](https://freetoolcabin.com/savings-goal-calculator/): Monthly deposit needed to reach a savings goal by a deadline. - [Inflation Calculator](https://freetoolcabin.com/inflation-calculator/): Value of a dollar between any two years using US CPI data. - [Budget Calculator](https://freetoolcabin.com/budget-calculator/): Monthly budget planner with the 50/30/20 rule and a donut chart. - [Debt Payoff Calculator](https://freetoolcabin.com/debt-payoff-calculator/): Compare debt snowball vs avalanche: payoff date and interest saved. - [CAGR Calculator](https://freetoolcabin.com/cagr-calculator/): Compound annual growth rate, or solve for a target end value. - [Water Intake Calculator](https://freetoolcabin.com/water-intake-calculator/): How much water to drink a day, with an hourly drinking schedule. - [Paint Calculator](https://freetoolcabin.com/paint-calculator/): How much paint for a room, minus doors and windows, in gallons or liters. - [Tile Calculator](https://freetoolcabin.com/tile-calculator/): How many tiles and boxes you need for a floor or wall, with waste. - [Flooring Calculator](https://freetoolcabin.com/flooring-calculator/): Work out flooring area, boxes needed and cost with waste allowance. - [Mulch Calculator](https://freetoolcabin.com/mulch-calculator/): Find how much mulch you need in cubic yards and bags. - [Gas Mileage Calculator](https://freetoolcabin.com/gas-mileage-calculator/): MPG and L/100 km from odometer readings, plus trip cost. - [Tire Size Calculator](https://freetoolcabin.com/tire-size-calculator/): Compare two tire sizes: diameter, difference % and speedometer error. - [Car Depreciation Calculator](https://freetoolcabin.com/car-depreciation-calculator/): Estimate your car's value over time and its projected resale price. - [Cooking Time Calculator](https://freetoolcabin.com/cooking-time-calculator/): Roast and turkey cooking times by meat, weight and oven temperature. - [Thawing Time Calculator](https://freetoolcabin.com/thawing-time-calculator/): How long to thaw a turkey or meat in the fridge or cold water. - [CTR Calculator](https://freetoolcabin.com/ctr-calculator/): Calculate click-through rate and compare it with industry benchmarks. - [Conversion Rate Calculator](https://freetoolcabin.com/conversion-rate-calculator/): Calculate e-commerce conversion rate, revenue per visitor and goals. - [Capacitor Code Calculator](https://freetoolcabin.com/capacitor-code-calculator/): Decode 3-digit capacitor codes to pF, nF and µF, and back. - [Power Factor Calculator](https://freetoolcabin.com/power-factor-calculator/): Calculate power factor, kW, kVA and kVAR, and correction capacitor size. - [Cups to Grams](https://freetoolcabin.com/cups-to-grams/): Convert cups, tablespoons and teaspoons to grams for flour, sugar, butter and more. - [Baking Conversion Calculator](https://freetoolcabin.com/baking-conversion-calculator/): Cups to grams by ingredient, oven temperatures and pan size swaps. - [EV Charging Cost Calculator](https://freetoolcabin.com/ev-charging-cost-calculator/): Cost to charge an electric car, per charge, per mile and per km. - [CPM Calculator](https://freetoolcabin.com/cpm-calculator/): Solve CPM, cost, impressions, CTR and CPC for ad campaigns. - [LED Resistor Calculator](https://freetoolcabin.com/led-resistor-calculator/): Find the resistor for an LED, with nearest standard value and wattage. - [Quote Estimate Generator](https://freetoolcabin.com/quote-estimate-generator/): Create a quote or estimate with line items and tax, then save as PDF. - [Voltage Divider Calculator](https://freetoolcabin.com/voltage-divider-calculator/): Vout from R1, R2 and Vin, with loaded and unloaded output. - [Speed Distance Time Calculator](https://freetoolcabin.com/speed-distance-time-calculator/): Solve for speed, distance or travel time and get your arrival time. - [Horsepower & Torque Calculator](https://freetoolcabin.com/horsepower-calculator/): Convert torque and RPM to horsepower and estimate quarter-mile times. - [Gravel & Crushed Stone Calculator](https://freetoolcabin.com/gravel-calculator/): Work out cubic yards, tons and bags of gravel or crushed stone. - [Roofing Calculator (Roof Squares)](https://freetoolcabin.com/roofing-calculator/): Estimate roof area, squares, shingle bundles and cost from pitch. - [Pizza Dough Calculator (Baker's Percentage)](https://freetoolcabin.com/pizza-dough-calculator/): Work out flour, water, salt and yeast for any number of pizzas. - [Sourdough & Bread Hydration Calculator](https://freetoolcabin.com/bread-hydration-calculator/): Find true dough hydration with starter, or build a sourdough recipe. - [A/B Test Significance Calculator](https://freetoolcabin.com/ab-test-significance-calculator/): Check if your A/B test result is statistically significant. - [ROAS Calculator (Return on Ad Spend)](https://freetoolcabin.com/roas-calculator/): Calculate ROAS, break-even ROAS and profit for each ad channel. - [Battery Life Calculator](https://freetoolcabin.com/battery-life-calculator/): Estimate how long a battery lasts from its mAh or Wh and the load. - [Series & Parallel Resistor Calculator](https://freetoolcabin.com/series-parallel-resistor-calculator/): Add resistors in series or parallel and find standard value combinations. - [Online Alarm Clock](https://freetoolcabin.com/alarm-clock/): Set multiple alarms with sounds, snooze and keep-screen-awake. - [Today's Date](https://freetoolcabin.com/todays-date/): What is today's date? Live date in every format: ISO, US/EU, week number, Unix, Hijri, Hebrew. - [Days Between Dates](https://freetoolcabin.com/days-between-dates/): Count days, weeks, months and business days between two dates. - [Countdown Timer](https://freetoolcabin.com/countdown-timer/): Online timer with alarm sound. - [10 Minute Timer](https://freetoolcabin.com/10-minute-timer/): A ready-to-go 10 minute countdown with alarm and fullscreen. - [30 Minute Timer](https://freetoolcabin.com/30-minute-timer/): A ready-to-start 30 minute countdown with alarm, fullscreen and presets. - [5 Minute Timer](https://freetoolcabin.com/5-minute-timer/): A 5-minute countdown with alarm sound and fullscreen mode. - [1 Minute Timer](https://freetoolcabin.com/1-minute-timer/): A ready-to-go 60 second countdown with alarm and fullscreen. - [15 Minute Timer](https://freetoolcabin.com/15-minute-timer/): A ready-to-go 15 minute countdown with alarm, presets and fullscreen view. - [20 Minute Timer](https://freetoolcabin.com/20-minute-timer/): A ready-to-go 20 minute countdown with alarm, presets and fullscreen view. - [Week Number Calculator](https://freetoolcabin.com/week-number-calculator/): See the current ISO week number and look up the week of any date. - [Business Days Calculator](https://freetoolcabin.com/business-days-calculator/): Count working days between dates, excluding weekends and holidays. - [Pomodoro Timer](https://freetoolcabin.com/pomodoro-timer/): 25/5 focus and break timer with alerts and a task list. - [Interval Timer](https://freetoolcabin.com/interval-timer/): HIIT and Tabata interval timer with rounds, sets, beeps and voice cues. - [Military Time Converter](https://freetoolcabin.com/military-time-converter/): Convert between 12-hour and 24-hour military time. ## Site information - [About](https://freetoolcabin.com/about/) - [How we build and test our tools](https://freetoolcabin.com/how-we-test/) - [Contact](https://freetoolcabin.com/contact/): hello@freetoolcabin.com - [Full list of all tools](https://freetoolcabin.com/llms-full.txt)