How to Sum Across Worksheets in Microsoft Excel. Using multiple sheets in the same Excel workbook helps organize data into distinct categories. For example, you might have sales data for each of ...

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

VIDEO: Microsoft Excel offers many ways for you to manipulate and organize data, including using multiple "sheets" or tabs within the same spreadsheet file.

For example, the SUM function accepts two numbers and returns a number. Functions of different categories in Excel often return the same data type.

Microsoft Excel offers many ways for you to manipulate and organize data, including using multiple "sheets" or tabs within the same spreadsheet file.

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.