Octal Converter
Convert between octal (base 8) and decimal/binary.
Input Data
Mode
Value
Results
Converted value.
52
Explanatory note about the result.
八進制 64 = 十進制 52。
At a glance:Octal digits are powers of 8; each octal digit maps to 3 binary bits. Complements base-converter and binary-converter.
Formula
decimal = Σ d_i × 8^i.
How to Use
- Pick a mode and enter a value.
- The tool returns the conversion.
Case Studies
17₈ → 15
1·8+7 = 15.
FAQ
Why octal?
Compact grouping of binary, historically used in Unix permissions.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.