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

By mastering these three methods of using the SUM function in Microsoft Excel, you’ll be well on your way to becoming a more efficient and productive user. From simple calculations to powerful ...

You can sum cells across multiple sheets in Excel. This article presents steps for Adding single-cell values or Adding values in the range of cells.

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

Kathleen W. wins a copy of Excel 2007 Miracles Made Easy for her question, “How can you set up a function to sum variable rows? For example, how would you sum every third cell where the row label is ...

There's more to Excel's Subtotal feature than you might realize. You can add multiple subtotaling functions to the same row, and you can add multiple rows.

Excel’s BYCOL() and BYROW() functions evaluate data across columns and rows, returning an array result set allowing you to bypass a lot of work.