Unit Converters
Metric or imperial, US cups or millilitres, megabytes or mebibytes: these converters switch between units in one step and show the result in every other unit at the same time. Each one uses exact, internationally defined conversion factors, such as 1 inch = 2.54 cm and 1 pound = 0.45359237 kg.
Each converter page also explains the units themselves and where common mix-ups happen, like the difference between US and UK gallons or between decimal and binary storage sizes.
Length ConverterConvert length and distance between metres, centimetres, millimetres, kilometres, inches, feet, yards, miles and nautical miles, with every unit at once.Weight ConverterConvert weight and mass between kilograms, grams, pounds, ounces, stone, metric tonnes, US and UK tons, troy ounces and carats, all units at once.Temperature ConverterConvert temperatures between Celsius, Fahrenheit, Kelvin and Rankine, with the formula and reference points for freezing, body temperature and boiling.Area ConverterConvert area between square metres, square feet, square yards, acres, hectares, square kilometres, square miles and more.Volume ConverterConvert volume between litres, millilitres, cubic metres, US and UK gallons, quarts, pints, cups, fluid ounces, tablespoons, teaspoons and cubic feet.Speed ConverterConvert speed between kilometres per hour, miles per hour, metres per second, knots, feet per second and Mach, with all units shown together.Cooking Measurement ConverterConvert recipe measurements between cups, tablespoons, teaspoons, millilitres, grams and ounces, with ingredient densities for flour, sugar, butter and more.Data Storage ConverterConvert data sizes between bits, bytes, kilobytes, megabytes, gigabytes and terabytes in both decimal (GB) and binary (GiB) units, plus megabits and gigabits.Time Unit ConverterConvert time durations between nanoseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years, decades and centuries.Fuel Economy ConverterConvert fuel economy between miles per gallon (US and UK), litres per 100 km, kilometres per litre and miles per litre, with CO₂ per km for petrol.