Number Base Converter

Convert whole numbers of any size between binary, octal, decimal, hexadecimal and any base from 2 to 36.

Your result will appear here

Fill in the fields and press Convert, or pick one of the examples.

About the Number Base Converter

Converts whole numbers between positional number systems: binary (base 2), octal (8), decimal (10), hexadecimal (16) and any other base from 2 to 36. Digits beyond 9 use the letters A–Z.

Arithmetic is done with big integers, so numbers with thousands of digits convert exactly.

Limitations

Whole numbers only (a leading minus sign is allowed); fractional digits are not supported.

How to use it

Type the number and choose the base it is written in.
Choose the base to convert to.
Press Convert. The result is also shown in the four most common bases.

Example

255 (decimal) → binary

→ 11111111

Formulas used

N = \sum_{k=0}^{m} d_k\, b^{k}

A number in base b is a sum of digits times powers of b.

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About the Number Base Converter

Limitations

How to use it

Formulas used

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About the Number Base Converter

Limitations

How to use it

Formulas used