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Hex to Octal Converter

Convert directly between two programmer bases: hexadecimal in, octal out. The easiest route is through binary, which this tool does for you. Everything runs locally in your browser.

=
377

Hex (base 16) in, Octal (base 8) out.

How it works

Expand each hex digit to 4 bits, then regroup the whole string into 3-bit chunks: fa = 1111 1010 → 011 111 010 → "372".

Examples

FAQ

How do I convert hexadecimal to octal?

Expand each hex digit to 4 bits, then regroup the whole string into 3-bit chunks: fa = 1111 1010 → 011 111 010 → "372". Or just paste your hexadecimal value into the box above and the octal result appears instantly.

Does this Hex to Octal converter run in my browser?

Yes. The conversion happens entirely client-side — nothing you type is uploaded — and it uses big-integer math, so even very long hexadecimal numbers convert exactly.

What is the largest number I can convert?

There is no practical limit. Because the converter works with arbitrary-precision integers, a hexadecimal value of any length converts without rounding or overflow.

Need other bases, custom radixes, or two-way editing? Use the full Number Base Converter.

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