You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.

2] Sum a Column in Excel using AutoSum feature Another great way to calculate sums in a column is to make use of the AutoSum feature. It is quite useful, so let us explain what needs to be done.

How to use AutoSum function? Select a cell next to the numbers you want to sum, click AutoSum on the Home tab in the Editing group, and select Sum from the menu.