# Wield Tool > 100+ free online tools in one place: unit converters, calculators, image tools, text tools and file tools. Fast, private and no sign-up required. All tools are free, need no account and run in the visitor's browser. Files opened in image, PDF and file tools are processed on the device and are not uploaded. ## Unit Converters Convert between metric, imperial and scientific units in one step. Each converter shows the result as you type, lists every supported unit and explains the formula behind it. - [Length Converter](https://wieldtool.com/converters/length/): Convert length and distance units instantly: centimeters, inches, feet, meters, kilometers, miles, yards and more. Free converter with formulas and tables. - [Weight and Mass Converter](https://wieldtool.com/converters/weight-and-mass/): Convert weight and mass units: kilograms, pounds, ounces, grams, stone, tons, carats, tola and more. Instant, accurate results with formulas and tables. - [Temperature Converter](https://wieldtool.com/converters/temperature/): Convert temperature between Celsius, Fahrenheit, Kelvin, Rankine and Réaumur. Instant results with the exact formulas and a quick reference table. - [Volume Converter](https://wieldtool.com/converters/volume/): Convert volume and capacity units: liters, milliliters, US and UK gallons, cups, fluid ounces, tablespoons, cubic meters and more. Instant and accurate. - [Area Converter](https://wieldtool.com/converters/area/): Convert area units: square meters, square feet, acres, hectares, square kilometers, square miles, marla, kanal and more. Instant results with formulas. - [Time Converter](https://wieldtool.com/converters/time/): Convert time units: seconds, minutes, hours, days, weeks, months, years, milliseconds and more. Free instant time unit converter with formulas. - [Currency Converter](https://wieldtool.com/converters/currency/): Convert between 160+ world currencies with daily updated exchange rates: USD, EUR, GBP, PKR, INR, AED, SAR and more. Free and easy to use. - [Speed Converter](https://wieldtool.com/converters/speed/): Convert speed units: miles per hour, kilometers per hour, meters per second, knots, feet per second and Mach. Instant results with formulas and tables. - [Fuel Economy Converter](https://wieldtool.com/converters/fuel-economy/): Convert fuel consumption between miles per gallon (US and UK), liters per 100 km and kilometers per liter. Instant, accurate fuel economy conversion. - [Acceleration Converter](https://wieldtool.com/converters/acceleration/): Convert acceleration units: meters per second squared, standard gravity (g), feet per second squared, Gal, km/h per second and mph per second. - [Force Converter](https://wieldtool.com/converters/force/): Convert force units: newtons, kilonewtons, pound-force, kilogram-force, dynes, kips and more. Free instant force converter with formulas. - [Torque Converter](https://wieldtool.com/converters/torque/): Convert torque units: newton-meters, foot-pounds, inch-pounds, kilogram-force meters and more. Instant, accurate torque conversion for tools and engines. - [Pressure Converter](https://wieldtool.com/converters/pressure/): Convert pressure units: psi, bar, kilopascals, pascals, atmospheres, mmHg, inHg, torr and more. Instant results for tires, weather and engineering. - [Energy Converter](https://wieldtool.com/converters/energy/): Convert energy units: joules, kilojoules, calories, kilocalories, kilowatt-hours, BTU, electronvolts, foot-pounds and more. Fast and accurate. - [Power Converter](https://wieldtool.com/converters/power/): Convert power units: watts, kilowatts, megawatts, horsepower (mechanical and metric), BTU per hour, tons of refrigeration and more. Instant results. - [Electric Charge Converter](https://wieldtool.com/converters/electric-charge/): Convert electric charge units: coulombs, milliamp-hours, amp-hours, microcoulombs, elementary charges, faradays and more. Free instant converter. - [Voltage Converter](https://wieldtool.com/converters/voltage/): Convert voltage units: volts, millivolts, microvolts, kilovolts, megavolts, abvolts and statvolts. Free, instant electric potential converter. - [Electric Current Converter](https://wieldtool.com/converters/electric-current/): Convert electric current units: amperes, milliamperes, microamperes, kiloamperes, abamperes and more. Free, instant amp converter with formulas. - [Electrical Resistance Converter](https://wieldtool.com/converters/electric-resistance/): Convert electrical resistance units: ohms, milliohms, kilohms, megohms, gigohms, abohms and statohms. Free, instant resistance converter. - [Density Converter](https://wieldtool.com/converters/density/): Convert density units: kilograms per cubic meter, grams per cubic centimeter, pounds per cubic foot, pounds per gallon and more. Instant results. - [Frequency Converter](https://wieldtool.com/converters/frequency/): Convert frequency units: hertz, kilohertz, megahertz, gigahertz, revolutions per minute, radians per second and more. Free instant converter. - [Angle Converter](https://wieldtool.com/converters/angle/): Convert angle units: degrees, radians, gradians, arcminutes, arcseconds, turns and mils. Free, instant angle converter with formulas and table. - [Concentration Converter](https://wieldtool.com/converters/concentration/): Convert mass concentration units: mg/L, g/L, ppm, ppb, mg/dL, µg/mL, percent w/v and more. Free instant converter for water and lab solutions. - [Metric Prefix Converter](https://wieldtool.com/converters/prefixes/): Convert between metric (SI) prefixes: kilo, mega, giga, milli, micro, nano, pico and all others from quecto to quetta. Free and instant. - [Illuminance Converter](https://wieldtool.com/converters/light/): Convert illuminance units: lux, foot-candles, phot, nox and lumens per square meter or foot. Free instant light level converter with a reference table. - [Flow Rate Converter](https://wieldtool.com/converters/flow/): Convert volumetric flow rate units: liters per minute, gallons per minute, cubic meters per hour, CFM, liters per second and more. Instant results. - [Data Storage Converter](https://wieldtool.com/converters/data-storage/): Convert data storage units: bits, bytes, KB, MB, GB, TB, PB and binary units KiB, MiB, GiB, TiB. Free instant converter with clear explanations. - [Data Transfer Rate Converter](https://wieldtool.com/converters/data-transfer/): Convert data transfer rates: Mbps, MB/s, Gbps, kbps, MiB/s and more. See what your internet speed means in megabytes per second. Free and instant. - [Image Resolution Converter](https://wieldtool.com/converters/image-resolution/): Convert image and print resolution units: DPI, PPI, dots per centimeter, dots per millimeter and pixel pitch in micrometers. Free and instant. - [Typography Unit Converter](https://wieldtool.com/converters/typography/): Convert typography units: pixels, points, picas, em, rem, inches, millimeters and twips. Free instant px to pt and pt to px converter for web and print. - [Sound Level Converter](https://wieldtool.com/converters/sound/): Convert sound level units: decibels, bels, nepers and centibels. Free instant converter with a decibel chart of common sounds and what the numbers mean. - [Number Base Converter](https://wieldtool.com/converters/number-base/): Convert numbers between binary, decimal, hexadecimal, octal and any base from 2 to 36. Free instant base converter that handles very large numbers. - [Heat Transfer Coefficient Converter](https://wieldtool.com/converters/heat-transfer/): Convert heat transfer coefficient (U-value) units: W/(m²·K), BTU/(h·ft²·°F), kcal/(h·m²·°C) and more. Free instant engineering converter. - [Viscosity Converter](https://wieldtool.com/converters/viscosity/): Convert dynamic viscosity units: centipoise, pascal-seconds, millipascal-seconds, poise, lb/(ft·s), reyn and more. Free and instant. - [Surface Tension Converter](https://wieldtool.com/converters/surface-tension/): Convert surface tension units: newtons per meter, millinewtons per meter, dynes per centimeter, erg/cm², lbf/ft and more. Free and instant. - [Permeability Converter](https://wieldtool.com/converters/permeability/): Convert permeability units for porous media: darcy, millidarcy, microdarcy, square meters, square micrometers and more. Free and instant. - [Magnetic Field Converter](https://wieldtool.com/converters/magnetic-field/): Convert magnetic flux density units: tesla, gauss, millitesla, microtesla, nanotesla, milligauss and gamma. Free instant tesla to gauss converter. - [Radiation Converter](https://wieldtool.com/converters/radiation/): Convert radiation units: sieverts and rem, grays and rad, becquerels and curies, roentgens and coulombs per kilogram. Free and instant. - [Custom Unit Converter](https://wieldtool.com/converters/custom-units/): Create your own units with custom conversion factors and convert between them. Ideal for recipes, game currencies, business units and packaging. - [Units Museum](https://wieldtool.com/converters/units-museum/): Explore historic and unusual units of measurement: cubit, league, furlong, stone, tola, hogshead and more, with origins and modern equivalents. - [Units Duel Game](https://wieldtool.com/converters/units-duel/): Test your unit sense in a quick game. Two measurements appear: pick the bigger one. Covers length, weight, volume, speed, temperature and data. ## Calculators Work out health numbers, loan payments, project materials, grades and everyday maths. Every calculator shows the formula it uses so you can check the result yourself. - [BMI Calculator](https://wieldtool.com/calculators/bmi/): Calculate your BMI in metric or imperial units. See your weight category, the healthy weight range for your height and how body mass index is worked out. - [Calorie Calculator](https://wieldtool.com/calculators/calorie/): Find out how many calories you need per day to maintain, lose or gain weight. Uses the Mifflin-St Jeor equation with your age, size and activity level. - [BMR Calculator](https://wieldtool.com/calculators/bmr/): Calculate your basal metabolic rate (BMR): the calories your body burns at rest. Uses the Mifflin-St Jeor and Harris-Benedict equations. - [Macro Calculator](https://wieldtool.com/calculators/macro/): Turn your daily calories into grams of protein, carbohydrates and fat. Choose balanced, high protein, low carb, high carb or keto macro splits. - [Body Fat Calculator](https://wieldtool.com/calculators/body-fat/): Estimate your body fat percentage from simple tape measurements using the US Navy method. Shows fat mass, lean mass and your body fat category. - [Ideal Weight Calculator](https://wieldtool.com/calculators/ideal-weight/): Find your ideal body weight for your height using the Devine, Robinson, Miller and Hamwi formulas, plus the healthy BMI weight range. - [Mortgage Calculator](https://wieldtool.com/calculators/mortgage/): Calculate your monthly mortgage payment, total interest and a yearly amortization schedule. Includes down payment, property tax and home insurance. - [Loan Calculator](https://wieldtool.com/calculators/loan/): Calculate the monthly payment, total interest and total cost of a personal loan. Includes a yearly amortization schedule. Free and instant. - [Auto Loan Calculator](https://wieldtool.com/calculators/auto-loan/): Calculate your monthly car payment with down payment, trade-in value, sales tax, interest rate and term. See total interest and total vehicle cost. - [Investment Calculator](https://wieldtool.com/calculators/investment/): See how an investment grows with regular monthly contributions and compound returns. Year-by-year table of contributions, growth and balance. - [Compound Interest Calculator](https://wieldtool.com/calculators/compound-interest/): Calculate compound interest with daily, monthly, quarterly or yearly compounding and optional monthly deposits. See APY and years to double. - [Savings Goal Calculator](https://wieldtool.com/calculators/savings/): Find out how much you need to save each month to reach a savings goal by a set date, including interest on your current savings. - [Square Footage Calculator](https://wieldtool.com/calculators/square-footage/): Calculate square footage for rectangles, circles and triangles in feet or meters. Converts to square meters, square yards and acres, with cost estimate. - [Paint Calculator](https://wieldtool.com/calculators/paint-coverage/): Work out how many gallons or liters of paint you need for a room. Accounts for doors, windows, number of coats, ceiling and paint coverage. - [Concrete Calculator](https://wieldtool.com/calculators/concrete/): Calculate how much concrete you need for slabs, footings, walls and round columns. Results in cubic yards, cubic meters and number of bags. - [Flooring Calculator](https://wieldtool.com/calculators/flooring/): Calculate how much flooring you need for a room, including waste. Works for laminate, hardwood, vinyl, tile and carpet, with boxes and cost. - [Roofing Calculator](https://wieldtool.com/calculators/roofing/): Estimate roof area from the building footprint and pitch. Shows roofing squares, shingle bundles, pitch multiplier and roof angle. - [Mulch and Soil Calculator](https://wieldtool.com/calculators/mulch/): Calculate how much mulch, topsoil, compost or gravel you need for a garden bed. Results in cubic yards, cubic feet, liters and bags. - [Percentage Calculator](https://wieldtool.com/calculators/percentage/): Calculate percentages instantly: X% of Y, X is what percent of Y, percentage change, and increase or decrease by a percent. With formulas. - [Tip Calculator](https://wieldtool.com/calculators/tip/): Calculate the tip and total for any bill and split it between any number of people. Compare 10%, 15%, 18%, 20% and 25% tips at a glance. - [Discount Calculator](https://wieldtool.com/calculators/discount/): Calculate the sale price and savings for any percentage discount. Supports stacked discounts and sales tax to show the final price you pay. - [Date Difference Calculator](https://wieldtool.com/calculators/date-difference/): Count the days, weeks, months and years between two dates. Also shows weekdays, weekend days, hours and minutes. Free and instant. - [Age Calculator](https://wieldtool.com/calculators/age/): Calculate your exact age in years, months and days from your date of birth. Also shows total months, weeks, days and the days until your next birthday. - [Time Duration Calculator](https://wieldtool.com/calculators/time-duration/): Calculate the hours and minutes between two times, subtract breaks and convert to decimal hours. Handy for timesheets, shifts and payroll. - [GPA Calculator](https://wieldtool.com/calculators/gpa/): Calculate your semester and cumulative GPA on a 4.0 scale. Add courses, letter grades and credit hours to see your grade point average instantly. - [Grade Calculator](https://wieldtool.com/calculators/grade/): Calculate your weighted course grade from assignments, quizzes and exams, and find the score you need on the final to reach your target grade. - [Average Calculator](https://wieldtool.com/calculators/average/): Calculate the mean, median, mode, range, sum and geometric mean of any list of numbers. Paste your data and get every average instantly. - [Fraction Calculator](https://wieldtool.com/calculators/fraction/): Add, subtract, multiply and divide fractions. Get the answer simplified to lowest terms, as a mixed number, a decimal and a percentage. - [Statistics Calculator](https://wieldtool.com/calculators/statistics/): Calculate standard deviation, variance, mean, median, mode, quartiles, IQR, range and standard error for any data set. Sample and population. - [Quadratic Equation Solver](https://wieldtool.com/calculators/quadratic/): Solve any quadratic equation ax² + bx + c = 0. Get real or complex roots, the discriminant, vertex and axis of symmetry with the formula explained. ## Image Tools Edit, convert and create images in your browser. Nothing is uploaded: every image is processed on your own device, so the tools work fast and keep your pictures private. - [Background Remover](https://wieldtool.com/image-tools/background-remover/): Remove the background from a photo automatically with AI that runs in your browser. Get a transparent PNG or add a solid color. No upload, no sign-up. - [Image Resizer](https://wieldtool.com/image-tools/image-resizer/): Resize an image to exact pixel dimensions or by percentage. Keep proportions, choose JPG, PNG or WebP and download instantly. No upload needed. - [Image Compressor](https://wieldtool.com/image-tools/image-compressor/): Compress JPG, PNG and WebP images online and cut file size by up to 80%. Batch compress, set quality and max width, download as ZIP. No upload. - [Image Cropper](https://wieldtool.com/image-tools/image-cropper/): Crop an image online with a draggable selection, exact pixel values or fixed ratios such as 1:1, 4:3 and 16:9. Download as JPG, PNG or WebP. - [Social Media Image Resizer](https://wieldtool.com/image-tools/social-media-resizer/): Resize images to the right size for Instagram, Facebook, X, LinkedIn, YouTube, Pinterest, TikTok and WhatsApp. Crop to fill or fit with a background. - [Color Picker](https://wieldtool.com/image-tools/color-picker/): Pick a color and get its HEX, RGB, HSL, HSV and CMYK values instantly. Convert between color formats and copy tints and shades with one click. - [Color Palette Generator](https://wieldtool.com/image-tools/color-palette-generator/): Generate color palettes from any base color: analogous, complementary, triadic, tetradic, split-complementary and monochromatic. Export CSS variables. - [CSS Gradient Generator](https://wieldtool.com/image-tools/css-gradient-generator/): Create linear, radial and conic CSS gradients visually. Add color stops, set the angle and copy the ready-to-use CSS background code. - [Color Contrast Checker](https://wieldtool.com/image-tools/color-contrast-checker/): Check the contrast ratio between text and background colors against WCAG 2 AA and AAA. See pass or fail results and fix the color in one click. - [Image Color Picker](https://wieldtool.com/image-tools/image-color-picker/): Upload an image and click any pixel to get its HEX, RGB and HSL color code. Also extracts the main colors of the image as a palette. No upload. - [Meme Generator](https://wieldtool.com/image-tools/meme-generator/): Make a meme online with your own image. Add top and bottom text in the classic bold style, adjust size and colors and download with no watermark. - [Watermark Generator](https://wieldtool.com/image-tools/watermark-generator/): Add a text or logo watermark to your photos online. Control size, opacity, rotation and position, or tile it across the image. Free and private. - [GIF Maker](https://wieldtool.com/image-tools/gif-maker/): Make an animated GIF from your images online. Set frame order, speed, size and looping, then download. Everything happens in your browser. - [QR Code Generator](https://wieldtool.com/image-tools/qr-generator/): Create free QR codes for links, text, Wi-Fi, email, phone and SMS. Custom colors and size, PNG and SVG download. Codes never expire. No sign-up. - [Favicon Generator](https://wieldtool.com/image-tools/favicon-generator/): Create a complete favicon package from one image: favicon.ico, PNG icons, Apple touch icon, Android icons, web manifest and the HTML code. - [Image Converter](https://wieldtool.com/image-tools/image-converter/): Convert images between JPG, PNG, WebP, GIF, BMP and ICO, and open HEIC photos from iPhone. Batch convert in your browser with no upload. - [Image to Base64 Converter](https://wieldtool.com/image-tools/image-to-base64/): Convert an image to a Base64 string or data URI for HTML and CSS. Copy as raw Base64, img tag or CSS background, or decode Base64 back to an image. - [Image to Text (OCR)](https://wieldtool.com/image-tools/image-to-text/): Extract text from images, screenshots and scans with free online OCR. Supports English, Arabic, Urdu, Hindi and more. Runs in your browser. ## Text Tools Count, clean, compare and generate text, or measure how fast you type, read, speak and write. Everything works as you type and your text stays in your browser. - [Word Counter](https://wieldtool.com/text-tools/word-counter/): Count words, characters, sentences, paragraphs and lines as you type. See reading time, speaking time and keyword density. Free and private. - [Find and Replace](https://wieldtool.com/text-tools/find-replace/): Find and replace words or phrases in any text online. Supports match case, whole words and regular expressions. Free, instant and private. - [Remove Duplicate Lines](https://wieldtool.com/text-tools/remove-duplicates/): Remove duplicate lines from any list or text online. Options to ignore case, trim spaces, remove empty lines and sort the result. Free and private. - [Text Compare](https://wieldtool.com/text-tools/text-diff/): Compare two texts online and see which lines were added or removed. Free diff checker with options to ignore case and whitespace. Nothing is uploaded. - [Sort Lines](https://wieldtool.com/text-tools/sort-lines/): Sort lines of text alphabetically, in reverse, by number or by length, or shuffle them randomly. Remove duplicates and empty lines. Free and private. - [Reverse Text](https://wieldtool.com/text-tools/reverse-text/): Reverse text online: flip letters backwards, reverse word order, reverse each word, reverse lines or turn text upside down. Free and instant. - [Lorem Ipsum Generator](https://wieldtool.com/text-tools/lorem-ipsum/): Generate lorem ipsum placeholder text by paragraphs, sentences or words. Optional HTML paragraph tags. Copy or download dummy text for your designs. - [Random Text Generator](https://wieldtool.com/text-tools/random-text/): Generate random English words, sentences, paragraphs or random character strings with letters, numbers and symbols. Free, instant and unlimited. - [Typing Speed Test](https://wieldtool.com/text-tools/typing-speed-test/): Take a free typing speed test for 30 seconds, 1, 2 or 5 minutes. Measure your words per minute (WPM) and accuracy, and see how you compare. - [Reading Speed Test](https://wieldtool.com/text-tools/reading-speed-test/): Test your reading speed in words per minute with a short timed passage. See how you compare with the average adult and how long a book would take you. - [Speaking Speed Test](https://wieldtool.com/text-tools/speaking-speed-test/): Measure how fast you speak in words per minute. Read a passage aloud with a timer and find out how many words your speech or presentation needs. - [Handwriting Speed Test](https://wieldtool.com/text-tools/handwriting-speed-test/): Test how fast you write by hand. Copy a passage with pen and paper against a timer and get your handwriting speed in words and letters per minute. ## File Tools Convert files, organize PDF pages, inspect metadata and fix subtitles without uploading anything. Files are processed locally in your browser. - [File Converter](https://wieldtool.com/file-tools/file-converter/): Convert files online without uploading: images (JPG, PNG, WebP, HEIC), PDF to images or text, audio (MP3, WAV), video (MP4, WebM) and CSV or JSON. - [PDF Organizer](https://wieldtool.com/file-tools/pdf-organizer/): Merge PDFs, split a PDF into pages, reorder, rotate, delete and extract pages online. Free, with no upload: your documents stay on your device. - [File Metadata Viewer](https://wieldtool.com/file-tools/metadata-tools/): View and remove hidden metadata from photos and PDFs: EXIF camera data, GPS location, author and software. Download a clean copy. No upload. - [Subtitle Tools](https://wieldtool.com/file-tools/subtitle-tools/): Convert subtitles between SRT and WebVTT, shift timing to fix sync, convert frame rates, strip tags and extract plain text. Free and private. ## Site - [All tools](https://wieldtool.com/all-tools/) - [XML sitemap](https://wieldtool.com/sitemap.xml) - [About Wield Tool](https://wieldtool.com/about/) - [Contact](https://wieldtool.com/contact/) - [Privacy Policy](https://wieldtool.com/privacy-policy/) - [Terms of Use](https://wieldtool.com/terms/)