Number Base Converter
Convert numbers between binary, octal, decimal, hex and any base.
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Clear instructions
Find steps, examples and limitations below.
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Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Number Base Converter
Convert integers between binary, octal, decimal, hexadecimal and custom bases.
- 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.
Example and practical tips
Enter FF in base 16 to obtain decimal 255 and binary 11111111.
Frequently asked questions
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.
Practical guides
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How to Use Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and any custom base from 2 to 36. Free online number base converter for developers.
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