Binary to Octal Converter
Free online binary to octal converter with steps — instant, accurate binary to octal conversion in your browser.
Supports arbitrarily large non-negative integers (BigInt under the hood).
About binary to octal conversion
Number bases are just different ways of writing the same value: binary (base 2) uses digits 0–1, octal (base 8) uses 0–7, decimal (base 10) uses 0–9 and hexadecimal (base 16) uses 0–9 plus A–F. This converter parses your input as an arbitrary-precision integer and re-renders it in the target base — instantly and privately, in your browser.
Quick reference
1010in binary =12in octal =10in decimal =Ain hexadecimal- Hexadecimal digits:
A=10, B=11, C=12, D=13, E=14, F=15 - Each octal digit maps to exactly 3 binary digits; each hex digit maps to exactly 4
Frequently asked questions
How do I convert binary to octal manually?
Group the binary digits into sets of three from the right; each group maps to exactly one octal digit.
What is binary 101101 in octal?
101101 in binary equals 55 in octal.
Is this converter free and private?
Yes — free, no sign-up, and the conversion runs locally in your browser using arbitrary-precision integers. Nothing is uploaded.