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Number Base Converter

Convert numbers between decimal, hex, binary, octal — or any arbitrary base from 2 to 36.

Arbitrary base (2-36)

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How to use Number Base Converter

  1. Type a number in any base field.
  2. See the conversions in the other bases.
  3. For exotic bases, use the arbitrary-base section.

What is Number Base Converter?

Type a number in any of the four classic bases and the others update live. Need something exotic like base 7 or base 32? The arbitrary-base section handles it.

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FAQ

Does it handle negatives?
Yes — prefix with a minus sign.
What bases are supported beyond standard ones?
You can convert between any base from 2 to 36, including bases like 12, 16, 20, etc.
Are there limits on the number size?
No hard limit, but extremely large numbers may be constrained by your browser's memory capabilities.

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Author

MW
Marcus Webb"The DevTool Craftsman"

Full-Stack Developer & Tools Architect

Marcus has been writing code since the dial-up era. He's contributed to open-source developer tools and built CI/CD pipelines for startups.

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