Unit converter calculator

How it works

Choose a type (length, weight, temperature, area, volume, speed…), the unit you have and the unit you want.

The formula

Most units convert by a fixed factor: value × factor. Temperature also shifts: °C = (°F − 32) × 5 ÷ 9.

Worked example

10 miles × 1.609344 = 16.09 km. 100 °F = (100 − 32) × 5 ÷ 9 = 37.8 °C.

Good to know

• US and UK gallons are different sizes (3.785 L and 4.546 L).