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Octal to Hex Converter

Go from octal to hexadecimal in one step. Both are shorthand for binary, so the conversion is really a regrouping of bits from threes into fours. Everything runs locally in your browser.

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ff

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

How it works

Turn each octal digit into 3 bits, then regroup into 4-bit nibbles: 372 = 011 111 010 → 1111 1010 → "fa".

Examples

FAQ

How do I convert octal to hexadecimal?

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

Does this Octal to Hex 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 octal 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 octal 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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