Octal Converter
This octal converter moves values between octal and binary, decimal or hexadecimal. Octal still appears in Unix file permissions, so quick conversion is useful day to day.
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What this tool does
Converting base-8 numerals to and from other radices. This octal converter is free, works on desktop and mobile, and requires no sign-up.
Also useful for: binary number to octal, convert binary to octal converter, convert dec to octal, converting hex to octal, decimal to octal calculator, decimal to octal converter, decimal to octal number conversion, hex to octal.
Features
- Octal to any base 2–36
- Choose the target base
- Arbitrary precision
- Instant output
How to use it
- Enter an octal value
- Pick the base to convert to
- Copy the result
Examples
Permission bits
755 (octal)493 (decimal) Common uses
- Reading file permission modes
- Legacy system work
- Teaching octal
Good to know
- Octal digits are 0–7 only
Frequently asked questions
Why does octal matter?
It maps cleanly to three-bit groups, which is why Unix permissions use it.
Popular searches for this tool
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