Binary to Octal Converter

Convert Binary integers to Octal with exact arbitrary-precision arithmetic. Signed values, long integers, common source prefixes, spaces, and underscore separators are accepted, and the result updates as the input changes.

How to convert Binary to Octal

Starting at the right, group the binary digits into sets of three and replace each group with its octal digit. Leading zeros may be added to complete the leftmost group.

Binary to Octal example

110101 in base 2 equals 65 in base 8. The converter supports values much larger than JavaScript's ordinary safe integer range because it uses integer arithmetic rather than floating-point numbers.

Common conversions: Binary to Decimal · Decimal to Binary · Binary to Hex · Hex to Binary · Decimal to Hex · Hex to Decimal · Binary to Octal · Octal to Binary