Octal to Decimal Converter

Octal to Decimal

Convert octal (base 8) numbers to decimal (base 10) in your browser. Prefixes like 0o are accepted on input. Need the opposite direction? Convert Decimal to Octal.

Related base conversions

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

Frequently asked questions

How do I convert octal to decimal?

Enter a octal value above. The decimal 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.