Unit Converters

Recipes, product specs, travel plans and technical documents all mix metric and imperial units. These converters show every unit at once, so you type a value a single time and read off the one you need.

24 tools

Data Storage Converter

Convert between bits, bytes, KB, MB, GB, TB and larger storage units.

Length Converter

Convert between metric and imperial lengths: mm, cm, m, km, inches, feet, miles and more.

Speed Converter

Convert speeds between km/h, mph, m/s, knots and other units.

Temperature Converter

Convert temperatures between Celsius, Fahrenheit, Kelvin and other scales.

Weight Converter

Convert weights between kilograms, pounds, ounces, stones and more.

Area Converter

Convert square metres, square feet, acres, hectares, marla, kanal and other area units.

Volume Converter

Convert litres, millilitres, gallons, cups, tablespoons, cubic metres, cubic feet and more.

Power Converter

Convert watts, kilowatts, horsepower, BTU per hour, tons of refrigeration and other power units.

Pressure Converter

Convert bar, psi, pascal, kPa, atmospheres, mmHg, inHg and other pressure units.

Pace Converter

Convert running pace between minutes per kilometre and per mile, and to and from speed in km/h or mph.

Fuel Consumption Converter

Convert between L/100 km, km/L, US mpg and UK mpg, including the inverse units.

Time Converter

Convert seconds, minutes, hours, days, weeks, months and years, down to milliseconds and nanoseconds.

Angle Converter

Convert degrees, radians, gradians, arcminutes, arcseconds, turns and mils.

Torque Converter

Convert newton metres, pound-feet, pound-inches, kilogram-force metres and other torque units.

Energy Converter

Convert joules, calories, kilowatt-hours, BTU, therms, electronvolts and other energy units.

Frequency Converter

Convert hertz, kilohertz, megahertz, gigahertz, RPM, radians per second and beats per minute.

Voltage Converter

Convert volts, millivolts, microvolts, kilovolts and megavolts, plus CGS units.

Electric Current Converter

Convert amperes, milliamperes, microamperes and kiloamperes, plus abamperes and statamperes.

Illuminance Converter

Convert lux, foot-candles, phot and other units of light falling on a surface.

Luminance Converter

Convert nits (cd/m²), foot-lamberts, lamberts, stilbs and other units of brightness.

Density Converter

Convert kg/m³, g/cm³, g/mL, lb/ft³, lb/gal and other density units.

Viscosity Converter

Convert dynamic viscosity (Pa·s, poise, centipoise) and kinematic viscosity (stokes, centistokes, m²/s).

Capacitance Converter

Convert farads, microfarads, nanofarads and picofarads, the units on capacitors and schematics.

Force Converter

Convert newtons, kilonewtons, pound-force, kilogram-force, dynes and other force units.

More about Unit Converters

Use the Length, Weight, Speed and Temperature converters for everyday measurements, and the Data Storage Converter when you need to compare file sizes, disk capacity or bandwidth figures given in bits, bytes, megabytes or terabytes.

The Area converter includes marla and kanal alongside square feet, acres and hectares, and the Volume converter keeps US, imperial and metric cups and gallons apart. Runners get a Pace Converter, drivers a Fuel Consumption Converter, and engineers converters for pressure, power, energy, torque, force, density, viscosity, frequency and electrical units.