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

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.

How to Sum a Column of Zeros in Excel. You can use the Sum function in Microsoft Office Excel to sum columns of data, whether your data is in an Excel table or is simply a range in a column of ...

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