ONLINE CONVERSION TOOL

Binary to Octal Converter

Convert binary numbers to octal quickly and accurately.

FREE NUMBER BASE TOOL

Convert Binary to Octal

Enter a number and get an accurate result instantly.

Octal result—

Numbers may include a leading minus sign. Hexadecimal accepts A–F.

About Binary to Octal conversion

Octal is a compact shorthand for binary because one octal digit always represents three binary digits. Grouping makes this conversion faster than calculating through decimal first.

How to convert Binary to Octal

Enter a valid binary number in the calculator above for an instant result. To understand the calculation by hand, follow these steps:

  1. Split the binary number into groups of three from the right.
  2. Pad the leftmost group with zeroes when necessary.
  3. Replace each group with its octal value from 0 through 7.

Binary to Octal conversion example

Example: 1101011₂ → 153₈. Group it as 001 101 011. These groups are 1, 5, and 3 in octal.

Use the calculator to verify the example, then try a value of your own. It accepts upper- and lowercase letters for hexadecimal input.

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