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Number Base Converter

Convert numbers between any bases from base 2 to base 36. Supports binary, octal, decimal, hexadecimal, and custom bases for advanced computing tasks.

Used 14.8K times today

Base 10
Base 2

How to Use Number Base Converter

  1. 1

    Enter the number to convert

    Type your number in the input field using digits valid for the selected source base.

  2. 2

    Set the source base

    Choose or type the radix of your input number, for example 10 for decimal, 16 for hexadecimal, or any value from 2 to 36.

  3. 3

    Set the target base and read the result

    Choose the target base and the converted number is displayed instantly, along with conversions in the four most common bases.

Frequently Asked Questions

What is the maximum supported base?
The converter supports bases from 2 (binary) up to 36. Base 36 uses digits 0–9 and letters A–Z, which is the maximum for alphanumeric representation.
What are common uses for non-standard bases?
Base 32 is used in data encoding (Crockford Base32). Base 36 is used in URL shorteners and identifier generation. Base 60 (sexagesimal) underlies time measurement but is outside the alphanumeric range of this tool.
How are letters used in bases above 10?
Bases above 10 use the letters A–Z to represent digit values 10–35. For example, in hexadecimal (base 16), A = 10, B = 11, up to F = 15.
Can I convert negative numbers?
Yes. Prefix your number with a minus sign (−) to convert negative integers across any supported base.

About Number Base Converter

The Number Base Converter on Utilko goes beyond simple binary and hexadecimal conversion to support any radix from base 2 to base 36. This makes it the most flexible number-system tool available for programmers, mathematicians, cryptographers, and computer science students who work with non-standard bases.

Every conversion is computed client-side with arbitrary precision for integer values, so you can safely convert large numbers without worrying about floating-point rounding errors. The tool simultaneously shows the result in binary, octal, decimal, and hexadecimal alongside your custom target base, giving you full context for every conversion.

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