Octal to Hexadecimal Converter
Convert octal numbers (base 8) to hexadecimal (base 16) with full steps.
How to use it
- Enter octal numbers to convert to hexadecimal.
Examples
| 377 | FF |
Octal (base 8) and hex (base 16) digits don't line up one-to-one, so the cleanest path between them is via binary: expand each octal digit to 3 bits, then regroup the full bit string into 4-bit nibbles to read off as hex.
Worked example
377 → binary: 3=011, 7=111, 7=111, giving 011111111. Regroup into 4-bit nibbles from the right: 1111 1111 (dropping the leading 0). 1111=F, 1111=F, giving FF.
Where this comes up
- Translating a legacy octal value (old Unix permission codes, older system dumps) into the hex format modern tools expect
- Working across systems or documentation that mix octal and hexadecimal conventions
- Computer science coursework covering conversion across the full set of common number bases
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Last updated 18 August 2026