Unit Converter
Centimetres to inches, kilograms to pounds, Celsius to Fahrenheit, kilometres to miles — every everyday conversion in one place.
—
Popular conversions
How to use it
Pick a category — length, weight, temperature or distance.
Type your value and set the from/to units. Results update as you type.
Swap in one tap to convert back the other way.
Built on the exact definitions
Most conversions here are not approximations: since 1959 the inch is defined as exactly 2.54 cm and the pound as exactly 0.45359237 kg, so your answers match official tables. Temperature uses the standard formulas. Whether you are buying fabric in metres for an American pattern, checking a suitcase against a kilogram limit, or reading a Fahrenheit forecast, the number you get is the number that is true.