Converters
Unit and measurement converters: length, weight, temperature, currency and more.
Tools in this category
Tile calculator Work out how many tiles, square meters and boxes you need for your floor or wall, with waste allowance and common sizes from 30x30 to 60x60 cm. Concrete calculator (cement, sand, gravel) Estimate cement bags, sand, gravel and water for slabs and floors: enter dimensions or m³, pick a 1:2:3, 1:2:4 or 1:3:5 mix, bag size and waste factor. Paint calculator (how much do I need) Work out how much paint you need: wall area minus doors and windows, coats and coverage rate, with instant results in liters and gallons. Free. Percentage calculator Find X% of any number, see what percent one value is of another and get the percentage change between two amounts in real time. Free, no sign-up. Celsius to Fahrenheit converter Convert Celsius to Fahrenheit (and °F to °C) instantly, with the exact formula, a temperature table and fever and oven examples. Free, no sign-up. CM to inches converter Convert centimeters to inches (and inches to cm) instantly, with the exact formula, a conversion table and feet-and-inches output. Free, no sign-up. Data storage converter (MB, GB, TB) Convert bit, Byte, KB, MB, GB, TB and PB instantly. Switch between decimal (1000, SI) and binary (1024, IEC) and see why your 1 TB drive shows only 931 GB. Angle converter Convert angles between degrees, radians, gradians, turns, arcminutes and arcseconds. Type one value and see every equivalent instantly, free and offline. Area converter Convert area between m², ft², km², hectares, acres, square yards and the Dominican tarea. One value shows every other unit instantly. Free, no sign-up. Cooking measurement converter Convert ml, liters, cups, tablespoons, teaspoons, ounces, pints and quarts, plus approximate grams per ingredient. Free tool, no sign-up needed. Fuel economy converter Convert fuel economy between L/100km, km/L, US MPG and UK MPG instantly. Enter one value and see every other unit at once, with a reference table. Currency converter Convert dollars, euros, Dominican peso and more using ECB reference rates via Frankfurter. Shows the live rate and its date. Free and no sign-up. Energy converter Convert energy between joule, kilojoule, calorie, kilocalorie, watt-hour, kWh, BTU and electronvolt instantly. Type one value and see every equivalent at once. Power converter Convert power between watts, kilowatts, mechanical horsepower, metric CV and BTU/h instantly. Type one value and unit to see every other. Free tool. Pressure converter Convert pressure between pascal, kPa, bar, psi, atmospheres, mmHg and mbar. One value shows every other unit at once. Free, client-side, no sign-up. Clothing & shoe size converter Convert clothing and shoe sizes between US, EU, UK, Mexico and Spain: women, men and kids, including S/M/L sizing and foot length in cm. Free. Time unit converter Convert seconds, minutes, hours, days, weeks, months and years instantly. Type one value and see every time equivalent, with average-length months and years. Speed converter Convert speed between m/s, km/h, mph, knots and feet per second instantly. Type one value and unit to see every other unit. Free, no sign-up needed. Grams to ounces converter Convert grams to ounces (and ounces to grams) instantly, with the formula, a handy conversion table and the troy ounce for gold. Great for cooking. Free. KG to lbs converter Convert kilograms to pounds (and pounds to kg) instantly with the exact factor, a handy conversion table and stones output. Free, no sign-up. km/h to mph converter Convert km/h to mph and mph to km/h instantly. For car speedometers, GPS and US speed limits. 1 mph = 1.609344 km/h, with a ready-to-use table. Liters to gallons converter Convert liters to gallons and gallons to liters instantly, with a US and imperial (UK) gallon selector, the exact formula and a handy conversion table. Meters to feet converter Convert meters to feet and feet to meters instantly, with the result also shown in feet and inches. Great for height, construction and altitude. Miles to KM converter Convert miles to kilometers and km to miles instantly with the exact 1.609344 factor, race distance table and mph to km/h guide. Free, no sign-up. Roman numerals converter Convert Roman numerals to numbers and numbers to Roman (1 to 3999) instantly, with error validation, the rules explained and a symbol reference table. Feet and inches to cm (height) Convert your height from feet and inches to centimeters and meters, and from cm back to feet and inches (5'10"). Exact factors, height chart and formula. Rule of three calculator Solve direct and inverse rule of three problems instantly: enter three values and get the unknown X, with the formula and worked examples. Free, no sign-up. Cups to ml converter (cooking) Convert cups, milliliters, tablespoons, teaspoons and fluid ounces instantly. Perfect for cooking US recipes with the right measures. Free, no sign-up.