How to Sum Numbers in Excel Using the SUM Function

How the SUM Function Works in Excel

The SUM function quickly adds numbers from cells or ranges.

Syntax

=SUM(number1, [number2], ...)

Example

Summing numbers in cells C2:C6 and F2:H2:

Example of summing values in Excel using SUM function — Using =SUM(C2:C6) adds all values from C2 to C6.
Using =SUM(F2:H2) adds all values from F2 to H2.