Binary to Octal Converter

Fast, accurate browser-based conversion between data representations.

About Binary to Octal Converter Tool

Published: Last Updated:

Binary to Octal groups binary bits in sets of 3 and converts each group to an octal digit (0–7). The conversion is direct: each 3-bit group maps to one of the 8 octal digits. This is particularly useful when working with Unix file permissions.

Key Features

  • Groups binary into 3-bit sets and converts each to octal digit.
  • Pads to complete 3-bit groups.
  • Runs in your browser.

How to Use the Tool

  1. Enter a binary string.
  2. Binary is grouped in 3-bit sets and each converted to its octal digit.

Core Benefits

  • Understand file permission binary encoding in Unix/Linux.

Common Use Cases

  • 111 101 101 → 755 (Unix rwxr-xr-x permission).

Pro Tips

  • Binary 111=7, 101=5, 100=4. chmod 644 = 110 100 100.

Use this free Binary to Octal Converter on GoodToolIt — instant, private, and works in any browser with no sign-up required.

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