Enter a decimal number to convert it to octal instantly. Handy for Class 11–12 computer science — see the side-by-side reference table below, or open the full converter for all four bases at once.
base 10 → base 8 · Open the full converter →
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A number written in decimal (base 10) is rewritten in octal (base 8). For example, 64 in decimal equals 100 in octal. The full converter at /tools/ shows binary, octal, decimal and hexadecimal together.
| Decimal | Octal |
|---|---|
| 1 | 1 |
| 8 | 10 |
| 10 | 12 |
| 16 | 20 |
| 64 | 100 |
| 100 | 144 |
| 255 | 377 |
| 512 | 1000 |
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