How to Use Number Base Converter

About this tool

Convert integers between binary, octal, decimal, hexadecimal and custom bases.

How to use Number Base Converter

1. Enter Number and choose From base.
2. Set Custom output base if a base other than the standard outputs is needed.
3. Copy the desired result and check any invalid-digit message.

Worked example

Enter FF in base 16 to obtain decimal 255 and binary 11111111.

Can I convert fractions?

This tool works with integers. A decimal point or fractional representation is not supported.

Why is a digit rejected?

Each base permits a different digit range. For example, binary input accepts only 0 and 1.

Put this guide into practice

• Number Base Converter — Convert numbers between binary, octal, decimal, hex and any base.