SUM is the spreadsheet equivalent of an open invite: it welcomes everything into the total, whether it belongs there or not.

Unlock the full potential of Excel's SUM function with advanced techniques for data analysis, conditional counting, and more.

Formulas are powerful tools for performing calculations and analyzing data in Excel. In this beginner’s guide, you’ll learn how to use formulas and explore some popular built-in functions.

Select the cell in your Microsoft Excel document that you would like to use for the sum of squares function and open the "Formulas" tab.