Octal to Binary Converter

Octal to Binary

Convert octal (base 8) numbers to binary (base 2) in your browser. Prefixes like 0o are accepted on input. Need the opposite direction? Convert Binary to Octal.

Related base conversions

• Binary to Octal(2 → 8)
• Binary to Decimal(2 → 10)
• Binary to Hex(2 → 16)
• Octal to Decimal(8 → 10)
• Octal to Hex(8 → 16)
• Decimal to Binary(10 → 2)
• Decimal to Octal(10 → 8)
• Hex to Binary(16 → 2)

Frequently asked questions

How do I convert octal to binary?

Enter a octal value above. The binary result is highlighted, and you can copy the raw or prefixed form.

Does this support large integers?

Yes — conversions use BigInt so values are not limited to 32-bit or 64-bit ranges.

Can I convert other bases too?

Switch the input base, click a different result to set the target, or open the main number base converter.