Hexadecimal to Octal
Convert hex numbers to octal instantly. For example, AB in hex is 253 in octal.
Hexadecimal to Octal — quick reference
| Hexadecimal | Octal |
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How to use the Hexadecimal to Octal
- Type or paste your hex value on the left.
- Read the octal result on the right — separate multiple values with spaces.
- Copy the result, or check the reference table below.
About the Hexadecimal to Octal
This tool converts hex numbers to octal. Hexadecimal is base 16, written with the digits 0-9 and A-F; octal is base 8, written with 0 through 7. Type a value on the left and the octal result appears instantly, and you can convert several values at once by separating them with spaces.
Worked example. Go through decimal as a bridge: AB in hex is 171 in decimal, and 171 in decimal is 253 in octal. This tool does both steps at once.
Both hex and octal are compact stand-ins for binary, one bundling bits in fours and the other in threes, so this conversion simply reshuffles the same underlying bits from one grouping into the other. The value comes through exactly — a whole number is regrouped, not recomputed, so there is nothing to round. The reference table underneath holds further hex-to-octal pairs for a manual check, and the whole process happens locally in your browser, keeping the numbers you enter off any server. For the reverse direction use the octal to Hexadecimal converter, or the all-in-one number base converter for arbitrary bases.
Frequently asked questions
What is AB in hex converted to octal?
AB in hex equals 253 in octal. You can confirm it with the worked example above, or by typing AB into the converter.
Is this hex to octal conversion exact?
Yes. Converting a whole number between bases changes only how it is written, not its value, so there is no rounding. AB and 253 are the same quantity expressed in base 16 and base 8.
Can I convert more than one hex value at once?
Yes. Separate each hex value with a space and every one is converted to octal on its own, in order.
Is my data uploaded anywhere?
No. The conversion runs entirely in your browser with JavaScript; nothing you type is sent to a server.