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Unit Conversion Calculators

Binary to Octal Calculator

Convert a base-2 (binary) number to base-8 (octal) notation.

Enter a binary number using only 0s and 1s.
Octal —
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About the Binary to Octal Calculator

Binary (base-2) uses only 0 and 1, while octal (base-8) groups binary digits into sets of three, using digits 0-7. Octal was historically popular in computing as a compact way to represent binary values.

Formula: Convert binary to decimal first, then repeatedly divide the decimal value by 8 and record the remainders to get the octal digits.

Useful for computer science coursework, file permission notation (like Unix chmod codes) and digital electronics.

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