Octal Converter
Octal to Decimal
Convert an octal number to decimal, binary, and hex
Decimal to Octal
Convert a decimal number to octal, binary, and hex
Formula
Decimal = sum of (octal_digit x 8^position) for each digit from right to left
Frequently Asked Questions
What is octal?
Octal is a base-8 number system using digits 0 through 7. It was historically used in computing because each octal digit corresponds to exactly three binary digits.
Where is octal used?
Octal is commonly used in Unix/Linux file permissions (e.g., 755, 644), and historically in some computing systems. It provides a compact way to represent binary data.
You may also need
R
Binary to Decimal Converter
Free binary to decimal converter. Convert binary numbers to decimal, hexadecimal, and octal. Supports up to 32-bit binary values.
ConversionR
Hexadecimal to Decimal Converter
Free online hexadecimal to decimal converter. Convert hex numbers to decimal and decimal numbers to hexadecimal.
Conversion