# Octal to Decimal Converter | Online Tool

A simple Octal to Decimal Converter that converts base-8 octal numerals to base-10 decimal numbers. Just enter the octal number and press convert to get the result!

## How to Use Octal to Decimal Converter?

1. Firstly, enter the octal number you wish to convert.
2. Then, simply click the convert button.
3. Consequently, the converted number will appear in the lower text box.
What is decimal?

It is a number expressed in the base-10 numeral system or decimal numeral system. Hence, it uses ten symbols, Namely, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. It is also the normal number system that we use in our daily life to represent basic quantities.

What is octal?

It is a number expressed in the base-8 numeral system or octal numeral system. Hence, it uses eight symbols. Namely, 0, 1, 2, 3, 4, 5, 6, and 7.

How to convert Octal to Decimal?

One can achieve this by using the following steps:
Assume any octal number to be ono(n-1) … o1o0
Then the decimal number is equal to:
onx8n+o(n-1)x8(n-1)+ … +o1x81+ox80.
For instance, let the octal number be 322.
We can calculate the equivalent decimal number as,
(3 × 8²) + (2 × 8¹) + (2 × 8⁰) = 210