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Octal Converter

Convert octal to decimal, binary or hex - and back.

How to use

  1. Enter an octal value (digits 0-7).
  2. Pick the target base.
  3. Copy the result - all four bases are shown.

Frequently asked questions

Where is octal still used?

Unix file permissions - chmod 755 is octal for rwxr-xr-x, each digit encoding three permission bits.

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