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Hexadecimal to Octal Converter

Convert hexadecimal (base-16) numbers to octal (base-8).

Try an example:
Binary (2)
11111111
Octal (8)
377
Decimal (10)
255
Hexadecimal (16)
ff

Converting Hexadecimal to Octal

Hex and octal have no direct digit mapping, so convert through decimal (or binary).

How to convert Hexadecimal to Octal by hand

  1. Convert the hex value to decimal (or to binary).
  2. Convert that to octal.
  3. Read off the octal digits 0–7.

Worked example

FF (hex) → 377 (octal) — FF = 255 decimal = 377 octal.

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Frequently asked questions

How do I convert Hexadecimal to Octal?

Convert the hex value to decimal (or to binary). Convert that to octal. Read off the octal digits 0–7. Or just use the converter on this page — it does it instantly. Example: FF (hex) becomes 377 (octal).

What is FF (hex) in octal?

FF (hex) converts to 377 (octal). FF = 255 decimal = 377 octal.

Is this converter free and private?

Yes — it is free and unlimited, and the conversion runs entirely in your browser, so nothing is uploaded to a server.