Hex to Octal Converter
Convert hexadecimal to octal instantly — type on the left and the result appears on the right. Everything runs in your browser, nothing is uploaded.
How to convert hex to octal
Hex and octal do not line up digit-for-digit, so the clean route is through binary: expand the hex to 4-bit groups, then re-slice the bits into threes for octal.
Method: convert through binary, because 8 and 16 are both powers of 2.
- Expand hex to binaryReplace each hex digit with its four bits.
- Regroup into threesRe-slice the bits into groups of three from the right, padding if needed.
- Read as octalTurn each 3-bit group into an octal digit from 0 to 7.
Examples 1A = 32FF = 377
Hex to Octal Table
Common hexadecimal values with their octal equivalents.
| Hexadecimal | Octal |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 10 |
| 9 | 11 |
| A | 12 |
| B | 13 |
| C | 14 |
| D | 15 |
| E | 16 |
| F | 17 |
| 10 | 20 |
| 14 | 24 |
| 20 | 40 |
| 32 | 62 |
| 40 | 100 |
| 64 | 144 |
| 80 | 200 |
| FF | 377 |
| 100 | 400 |
| 200 | 1000 |
| 3E8 | 1750 |
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Frequently asked questions
How do you convert hex to octal?
Turn each hex digit into four bits, join them, regroup the bits into threes from the right, then read as octal. 1F = 0001 1111 = 011 111 = 37.
Can I convert hex to octal directly?
Not digit-for-digit — go through binary or decimal, since 8 and 16 do not share a simple digit mapping.
What is FF in octal?
FF, which is 255, is 377 in octal.