Hex to octal converter
Type a hex value to get the matching octal number with the binary step in between.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter hexadecimal number.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Turn each hex digit into 4 bits, then regroup the bits into groups of 3 from the point and turn each group into one octal digit.
Example
Inputs: Hexadecimal number = FF. Result: Result in octal: 377.
FF
377
Limits and caveats
- Negative numbers keep a minus sign in front of the magnitude; they are not shown in two's complement.
- Up to 2000 digits before the point and 200 after it.
Questions about this tool
How do I convert FF to octal?
FF = 1111 1111 in binary. Regrouped in threes, 011 111 111 = 377.
Why are there no 8s or 9s in the result?
Octal uses only the digits 0 to 7.
Does it support fractions?
Yes. Hex 0.8 is 0.1000 in binary, and grouped in threes from the point that gives octal 0.4.