Binary to Octal Converter
Octal packs binary three bits at a time, which is why it shows up in Unix file permissions. This converter turns a bit string into its base-8 form. Everything runs locally in your browser.
Binary (base 2) in, Octal (base 8) out.
How it works
Group the bits into threes from the right and convert each group: 110 101 → 6 5 → "65".
Examples
- 10101052
- 11111111377
- 100000000002000
FAQ
How do I convert binary to octal?
Group the bits into threes from the right and convert each group: 110 101 → 6 5 → "65". Or just paste your binary value into the box above and the octal result appears instantly.
Does this Binary to Octal converter run in my browser?
Yes. The conversion happens entirely client-side — nothing you type is uploaded — and it uses big-integer math, so even very long binary numbers convert exactly.
What is the largest number I can convert?
There is no practical limit. Because the converter works with arbitrary-precision integers, a binary value of any length converts without rounding or overflow.
Need other bases, custom radixes, or two-way editing? Use the full Number Base Converter.