Online adding calculator. Calculate the sum of 2 numbers.

**How to add :** Enter 2 numbers to add and press the = button to get the sum result:

Summation, also called addition, is the process of calculating the total of two (or more) addends. What is an addend? Those numbers which are being added together are called addends, which, in our calculator, are marked as A and B. The result of this process is called a sum, in this addition calculator known as C.