# Octal Calculator

Enter two octal values in the given input fields and select the operator to perform a mathematical operation using base 8 calculator.

Octal calculator is an online tool that can be used to add, subtract, multiply, or divide two octal numbers.

## What is octal number system?

Octal number system is the base-8 number system, and uses the digits 0 to 7. In octal system, each place is a power of eight. For example:

450 = 4 × 82 + 5 × 81 + 0 × 80

## How to add octal numbers?

Octal addition is a bit different from decimal or binary addition. Here is the octal addition table to understand addition of octal numbers.

 + 0 1 2 3 4 5 6 7 0 0 1 2 3 4 5 6 7 1 1 2 3 4 5 6 7 10 2 2 3 4 5 6 7 10 11 3 3 4 5 6 7 10 11 12 4 4 5 6 7 10 11 12 13 5 5 6 7 10 11 12 13 14 6 6 7 10 11 12 13 14 15 7 7 10 11 12 13 14 15 16

Example:

Solution:

Step 1: Place one value below the other one.

5 6 2

+ 6 4 7

Step 2: Add each integer using the above table. Carry the values onto next term as we do in general addition.

1  1 -------> Carry

5 6 2

+ 6 4 7

----------

1431

So, (562)8 + (647)8 = (1431)8

Octal addition calculator can save a lot of time and effort you put in octal calculations.