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Number Base Converter

Convert a number between binary, octal, decimal, hexadecimal, and base 36.

In every base

Decimal

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Bit length

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Base 256 bytes

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Set bits

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Bit view

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Values are handled as BigInt, so numbers well past the safe integer limit of 9007199254740991 stay exact. Digits above nine are shown as letters, so FF in hex is 255 in decimal. Binary output is grouped into four-bit nibbles for readability, which is not part of the value.

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What Is Number Base Converter?

The Number Base Converter converts the same value between binary, octal, decimal, hexadecimal, and base 32 at once, with grouped binary for readability. Type into any field and the others follow immediately.

Who Uses the Number Base Converter?

Students and developers use it for coursework in binary and hexadecimal, for reading bit masks and file headers, and for checking an address in a log that is printed in hex. The grouped binary view makes long values countable by eye.

How to Use the Number Base Converter

  1. Type a value into any of the five fields.
  2. Read the same number in the other bases.
  3. Use copy buttons to paste a value into your code or answer sheet.

Why Choose Our Number Base Converter?

  • Binary, octal, decimal, hex, and base 32
  • Grouped binary so long values stay readable
  • Live conversion as you type

Try the Number Base Converter above — it is free, fast, and works on any device. Bookmark this page to return whenever you need it.