Number Base Converter

Convert between binary, octal, decimal and hexadecimal.

Enter values

Value

From base

—

parse in source base → re-express in each target base

All calculations run locally in your browser and update instantly as you type.

What is hexadecimal used for?+

Hex (base 16) compactly represents binary data — each hex digit maps to exactly four bits, so it is common for colours, memory addresses and hashes.

All calculations run locally in your browser. Nothing you type is sent to a server.