Hexadecimal to octal converter
Enter a hexadecimal number using 0–9 and A–F.
Convert a hexadecimal number to octal.
About this tool
The hexadecimal to octal converter rewrites a base 16 number in base 8 notation. Use it when technical notes mix both formats, when checking legacy data, or during number system practice. The conversion keeps the numeric value unchanged and returns digits from zero through seven. Enter a whole hexadecimal value using numbers and letters from A to F to get the matching octal form.