Unit converter for length, mass, data, temperature and number bases

Type a value, choose the units, and see the result instantly. Below it, a grid shows your value in every unit of the category; tap one to copy it.

Categories

• Length, mass, volume, area, speed and time, with metric and common imperial or US units.
• Data sizes: decimal units (KB, MB, GB, TB are powers of 1000) and binary units (KiB, MiB, GiB, TiB are powers of 1024), side by side.
• Temperature: Celsius, Fahrenheit and Kelvin.
• Number bases: binary, octal, decimal, hexadecimal and base 36, including very large integers.

Questions

Is 1 GB 1000 MB or 1024 MB?

By the SI definition 1 GB is 1000 MB. 1024 MB is a gibibyte-style unit, written GiB. This converter shows both so you can see the difference.

How accurate are the results?

Conversions use exact definitions (for example 1 inch is 25.4 mm) and results are shown to 10 significant digits.

Does it need an internet connection after loading?

Conversions are calculated in your browser; nothing is sent anywhere.

Need to convert files instead? Convert PDF and image files.