Decimal to Octal Converter
Convert decimal 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 decimal to octal
Octal is base 8. Convert a decimal number to octal by dividing repeatedly by 8 and reading the remainders from last to first.
Method: repeated division by 8, reading the remainders from last to first.
- Divide by 8 and note the remainderDivide the decimal number by 8 and write down the remainder.
- Repeat until you reach 0Keep dividing each quotient by 8, noting each remainder.
- Read the remainders in reverseRead the remainders from last to first — that is your octal number.
Examples 26 = 32255 = 377
Decimal to Octal Table
Common decimal values with their octal equivalents.
| Decimal | Octal |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 10 |
| 9 | 11 |
| 10 | 12 |
| 11 | 13 |
| 12 | 14 |
| 13 | 15 |
| 14 | 16 |
| 15 | 17 |
| 16 | 20 |
| 20 | 24 |
| 32 | 40 |
| 50 | 62 |
| 64 | 100 |
| 100 | 144 |
| 128 | 200 |
| 255 | 377 |
| 256 | 400 |
| 512 | 1000 |
| 1000 | 1750 |
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Frequently asked questions
How do you convert decimal to octal?
Divide the number by 8, note the remainder, repeat until the quotient is 0, then read the remainders from last to first. 100 gives 144.
What is 8 in octal?
8 in decimal is 10 in octal, because octal rolls over after 7.
What is 64 in octal?
64 is 100 in octal, since 8 × 8 = 64.