🔣 Binary to Octal Converter
Enter a binary number to see its octal, decimal, and hexadecimal equivalents.
1
How this binary to octal converter works
This tool converts a binary (base-2) number into its octal (base-8) equivalent. It first interprets the binary digits you enter as a base-2 number and converts that to decimal as an intermediate step.
From decimal, the calculator repeatedly divides by 8 and records the remainders to build the octal result, since each octal digit corresponds to exactly three binary digits (because 2^3 = 8). Octal was historically popular in computing because it groups binary neatly, though hexadecimal is more common today.
Only the digits 0 and 1 are used from your input; any other characters are ignored. This tool is intended for general learning and reference purposes.
Last reviewed August 2026