The number with base eight is called octal number. It is represented by Q or O.
When decimal number is repetitively divided by eight and remainders are arranged in the form of octal numbers,then decimal number are converted into octal.
Each octal is multiplied by its weighted position. The sum of all products is known as decimal form of octal.
The three digit format of binary digits is used for octal to binary conversions or vice versa.