Unit converter

Pick a type, type a number, and see it converted instantly.

From

How to convert units

Pick a type. Length, weight, temperature, volume, area, speed, data size or time.
Type a number. Choose the units on both sides; the answer appears as you type.
See every unit. The table shows your amount in all units at once.

How many centimetres are in an inch?

Exactly 2.54 centimetres.

How do I convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32. For example 20 °C is 68 °F.

Is a gigabyte 1000 or 1024 megabytes?

Officially 1000 (GB). 1024 is a gibibyte (GiB), which some computers still label GB. Both are listed.