Converters
Units, measures and standards.
Size & Weight
Length, area, volume and weight — metric and imperial, exact by definition.
- Area Converter Convert between square metres, square feet, acres, hectares and square miles.
- Length Converter Convert between millimetres, centimetres, metres, kilometres, inches, feet, yards, miles and nautical miles.
- Volume Converter Convert between litres, millilitres, cubic metres, cubic yards, cubic feet, gallons, quarts and cups.
- Weight & Mass Converter Convert between kilograms, grams, pounds, ounces, stone and tonnes.
Everyday Units
Temperature, speed, time, angle, data and fuel economy.
- Angle Converter Convert between degrees, radians, gradians, turns, arcminutes and arcseconds.
- Data Storage Converter Convert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes and their binary equivalents.
- Fuel Economy Converter Convert between miles per gallon, litres per 100 km and kilometres per litre — including the difference between US and imperial gallons.
- Speed Converter Convert between km/h, mph, metres per second, feet per second, knots and Mach.
- Temperature Converter Convert between Celsius, Fahrenheit, Kelvin and Rankine.
- Time Converter Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years.
Physics & Engineering
Force, pressure, energy, power, density, torque, frequency and flow.
- Density Converter Convert between kg/m³, g/cm³, kg/L, lb/ft³, lb/in³ and lb/yd³.
- Energy Converter Convert between joules, kilojoules, calories, kilowatt hours, BTU and foot-pounds.
- Flow Rate Converter Convert between cubic metres per second and hour, litres per second and minute, US gallons per minute and CFM.
- Force Converter Convert between newtons, kilonewtons, pound-force, kilogram-force and dynes.
- Frequency Converter Convert between hertz, kilohertz, megahertz, gigahertz and RPM.
- Power Converter Convert between watts, kilowatts, horsepower, metric horsepower, BTU/h and tons of refrigeration.
- Pressure Converter Convert between pascals, kilopascals, bar, psi, atmospheres, torr and mmHg.
- Torque Converter Convert between newton metres, pound-feet, pound-inches and kilogram-force metres.