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How to use Number Base Converter

Enter a number and its current base, then read the equivalent in binary, octal, decimal, hexadecimal or a custom base.

Frequently asked questions

Which bases are supported?

Binary (2), octal (8), decimal (10), hexadecimal (16) and any custom base from 2 to 36.

How does hexadecimal represent values above 9?

It uses letters A–F for 10–15, so hex FF equals 255 in decimal.

Can I convert between two non-decimal bases?

Yes — enter a value in any base and it is converted to all the others in one step.

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