Unit Converters
Convert length, weight, temperature, data size, speed and dozens more.
Length Converter Quickly convert a length or distance between metric and imperial units - no sign-up, and nothing leaves your browser. Weight Converter Convert a weight between metric and imperial units instantly. Everything runs locally in your browser. Temperature Converter Convert a temperature between Celsius, Fahrenheit and Kelvin. Type a value and read off every scale. Data Size Converter Convert file or storage sizes between decimal (KB, MB, GB) and binary (KiB, MiB, GiB) units instantly. Area Converter Work out how big a space is in different units - switch a floor, garden or plot of land between square metres, square feet, acres and hectares. Volume Converter Switch a volume between metric and US measures - handy when a recipe lists cups or tablespoons but your jug shows millilitres and litres. Time Converter Turn a duration into any other unit of time - see how many seconds are in a day, or how many weeks make up a year, in one tap. Speed Converter Convert a speed between km/h, mph, knots and metres per second - perfect for reading a foreign speed limit or a boat or wind report. Pace Converter Convert your running pace between minutes per kilometre and minutes per mile, so race plans and treadmill numbers finally line up. Pressure Converter Convert a pressure reading between bar, psi, kPa, atmospheres and mmHg - handy for tyre pressures, weather charts and dive tables. Energy Converter Convert energy between joules, calories, watt-hours and BTU - handy for food labels, electricity bills and heating figures. Power Converter Convert power between watts, kilowatts, horsepower and BTU per hour - useful for car engines, motors and heating or cooling specs. Frequency Converter Convert a frequency between hertz, kHz, MHz, GHz and rpm - useful for audio, radio bands, processor clocks and spinning machinery. Angle Converter Convert an angle between degrees, radians, gradians and revolutions - handy for geometry, trigonometry and engineering drawings. Torque Converter Convert torque between newton-metres and pound-feet - exactly what you need when a tool or service manual uses the other unit. Voltage Converter Convert a voltage between volts, millivolts, kilovolts and microvolts - useful for electronics projects, sensors and battery specs. Current Converter Convert an electric current between amperes, milliamperes, microamperes and kiloamperes - useful for circuits, chargers and fuses. Charge Converter Convert electric charge between coulombs and ampere-hours - handy for comparing battery capacities listed in mAh, Ah or coulombs. Illuminance Converter Convert light levels between lux and foot-candles - handy for lighting design, photography and checking a room is bright enough. Parts-Per Converter Convert a concentration between ppm, ppb, ppt and percent - handy for water tests, air quality readings and lab measurements. Apparent Power Converter Convert apparent power between VA, kVA and MVA - exactly what you need when sizing a generator, UPS or transformer. Reactive Power Converter Convert reactive power between var, kvar and Mvar - handy for power-factor correction and electrical engineering calculations. Reactive Energy Converter Convert reactive energy between varh, kvarh and Mvarh - useful when reading industrial electricity meters and utility bills. Flow Rate Converter Convert a flow rate between litres per minute, gallons per minute, cubic metres per hour and cfm - handy for pumps, pipes and fans.