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.

You can't use a SUM() function to sum a filtered list, unless you intend to evaluate hidden and unhidden values. Here's how to sum only the values that meet your filter's criteria.

Every Excel expert knows how to navigate without a mouse and how to format data using keyboard shortcuts. But do you know how to insert a sum without typing the formula?

Open your spreadsheet in Microsoft Excel. Click the cell where you wish the total sum to appear. Type "=SUM (range1,range2,range3)" into the cell and replace "range#" with a range of data.