Unit converters

Convert length, weight, temperature, volume and dozens of other units.

• Angle Converter Convert angles between degrees, radians, gradians, turns, arcminutes and arcseconds, and switch between decimal degrees and degrees-minutes-seconds (DMS).
• Area Converter Convert area between square metres, square feet, acres, hectares, km² and square miles, using exact definitions and the formula for each pair.
• Clothing Size Converter Convert clothing sizes between US, UK, EU, French, Italian and letter sizes for women, men and children, plus bra sizes, with approximate body measurements.
• Cooking Converter Convert cups and spoons to grams for flour, sugar, butter, rice, honey and more, plus oven temperatures in °C, °F and gas mark, and US vs metric cups.
• Data Storage Converter Convert bits and bytes between kB, MB, GB, TB and KiB, MiB, GiB, TiB, and see why a 1 TB drive shows only about 931 GB in Windows.
• Data Transfer Rate Converter Convert data transfer rates between Mbps, Gbps, MB/s, MiB/s and more, and estimate the download time of a file at a given connection speed.
• Density Converter Convert density between kg/m³, g/cm³, g/mL, kg/L, lb/ft³, lb/in³ and lb/gal, with exact factors, formulas and reference densities of common materials.
• Energy Converter Convert energy between joules, calories, kcal, kWh, BTU, foot-pounds and electronvolts with exact definitions and the formula for each pair.
• Force Converter Convert force between newtons, kilonewtons, kilogram-force, pound-force, kips, dynes and poundals with exact definitions and the formula.
• Frequency Converter Convert frequency between Hz, kHz, MHz, GHz, RPM and rad/s, and turn a frequency into its period in seconds, milliseconds, microseconds or nanoseconds.
• Fuel Economy Converter Convert fuel economy between L/100 km, mpg (US), mpg (UK), km/L and gallons per 100 miles, and estimate the fuel and cost of a trip.
• GPS Coordinate Converter Convert GPS coordinates between decimal degrees, degrees-minutes-seconds, decimal minutes, UTM and MGRS on the WGS84 datum, with Norway and Svalbard zones.
• Height Converter (Metric/Imperial) Convert your height from centimetres to feet and inches, or from feet and inches to cm, with exact factors, adjustable rounding and a height chart.
• Length Converter Convert length between mm, cm, metres, km, inches, feet, yards, miles and nautical miles, using exact definitions and a formula for each pair.
• Power Converter Convert power between watts, kW, MW, mechanical horsepower, metric horsepower (PS) and BTU/h with exact definitions and the formula for each pair.
• Pressure Converter Convert pressure between Pa, kPa, bar, psi, atm, mmHg, torr and inHg with exact standard factors, the formula for each pair and a quick table.
• Shoe Size Converter Convert shoe sizes between US, UK, EU, Mondopoint and Japanese sizes for men, women, kids and babies, or find your size from your foot length in cm or inches.
• Speed Converter Convert speed between km/h, mph, m/s, ft/s, knots and Mach with exact factors, the formula for each pair and a quick conversion table.
• Temperature Converter Convert temperatures between Celsius, Fahrenheit and Kelvin, with the exact formula for each pair and a worked example using your own value.
• Time Converter Convert time between milliseconds, seconds, minutes, hours, days, weeks, months and years, with a days-hours-minutes breakdown of any duration.
• Torque Converter Convert torque between newton metres, lb-ft, lb-in, oz-in, kgf·m, kgf·cm and N·cm with exact factors, the formula and common tightening values.
• Volume Converter Convert volume between mL, litres, m³, teaspoons, tablespoons, cups, fluid ounces, pints, quarts and gallons, with US and UK units kept apart.
• Weight and Mass Converter Convert weight and mass between milligrams, grams, kilograms, tonnes, ounces, pounds and stone, using the exact international pound of 0.45359237 kg.