Octal Converter
Fast and accurate conversion for Octal (Base-8) numeral systems.
Professional Octal Conversion Guide
The Octal Converter is a specialized utility for working with the base-8 numeral system. While less common than HEX or Decimal today, Octal remains a critical system in legacy computing environments and specific unix-like file permission structures.
Expert Conversion Examples
Decimal to Octal
Decimal 64 is Octal 100. Each digit in octal represents a power of 8 (1, 8, 64, 512...).
Binary to Octal
Binary 111 101 becomes Octal 75. Simply group binary digits into sets of three.
Why Use Base-8?
Octal was historically used in systems like the PDP-8 and ICL 1900 because it provided a more compact way to represent binary than decimal, mapping perfectly to 12-bit, 24-bit, or 36-bit words. Today, its most famous use is in Unix File Permissions (e.g., chmod 755).
Octal Conversion FAQs
How do I convert Octal to Decimal?
Multiply each digit by 8 raised to the power of its position (starting from 0 on the right) and sum the results.
Is Octal the same as HEX?
No. Octal is Base-8 (0-7), while Hexadecimal is Base-16 (0-9, A-F). HEX is generally more popular in modern 32/64-bit computing.