Binary to Octal Converter

About this calculator

Because 8 is a power of 2 (2³), converting binary to octal doesn't require going through decimal — it's a direct grouping trick: starting from the right, split the binary digits into groups of three, padding the leftmost group with zeros if needed, then convert each group independently to its single octal digit (000–111 maps to 0–7).

This calculator performs that grouping and also shows the decimal equivalent. Octal was historically popular in computing (e.g., Unix file permissions like 755) because it compresses long binary strings into a shorter, still bit-aligned form that's easier for humans to read than raw binary.