Octal to Decimal Converter

Convert octal system to decimal system with this online converter.

How to convert Octal to Decimal

Converting an octal number from octal system to decimal system we need apply 2 steps:

  • Get each number of octal value from right to left multiply with power of eight.
  • Sum of each multiplied value is decimal result.

Let's see an example. Octal number is 753 :

3 * 8^0 = 3

5 * 8^1 = 40

7 * 8^2 = 448

Sum of the decimal values for each octal digit : (3 + 40 + 448)

The octal number 753 is equivalent to the decimal number 491: