Octal to Decimal Converter

Convert base-8 integers to base 10 and validate every octal digit.

Octal input

Result

—Exact integer conversion. Spaces and underscores are accepted as visual separators.

How to use this Octal to Decimal Converter

Convert octal integers to decimal exactly. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.