Octal to Hex Converter
Convert octal to hex: octal → binary (3 bits per digit) → group by 4, or octal → decimal → hex. Free base-8 to base-16 tool.
How to Convert Octal to Hex
Expand octal to binary in 3-bit chunks, regroup in 4-bit nibbles for hex—or use decimal as intermediate.
Route 1: octal → binary (3 bits/digit) → regroup by 4 → hex. Route 2: octal → decimal → hex.
377₈ = 11111111₂ → FF₁₆.
Useful when bridging Unix octal and modern hex dumps.
CS multi-base exercises. The table and FAQ on this page walk through the factor if you need it.
Conversion Examples
Example: 12 octal to hex
- 12₈=1010₂ → A₁₆
A hex
Small value.
Example: 377 octal to hex
- 377₈=11111111₂ → FF₁₆
FF hex
255 decimal.
Common Use Cases
- CS multi-base exercises.
- Comparing chmod octal to hex addresses.
- Legacy format translation.
- Self-checking conversions.
Frequently Asked Questions
How do you convert octal to hex?
Convert to binary (3 bits per octal digit), then group in fours for hex.
377 octal in hex?
FF hex (255 decimal).
Why use binary as a bridge?
Both octal (3 bits) and hex (4 bits) align cleanly on binary—fewer arithmetic errors.