How to Insert the Sum Formula in a Word Table

Tables in Word 2013 look similar to cells in an Excel spreadsheet, but unlike Excel, you can't start a formula simply by typing an equals sign. Word's formulas can also use a different notation, referring to sets of numbers by their relative position. To add table cells using the SUM function, insert a formula from the Layout tab.

Sum Cells in a Table

Step

Click the target cell in your table, open the Layout tab and click Formula in the Data section.

Formula button on Layout tab
credit: Image courtesy of Microsoft
Formula to display 26 as the East total
credit: Image courtesy of Microsoft

Step

Write a formula using the function =SUM to add cells. When you first open the formula window, Word defaults to the formula =SUM(ABOVE). If you want to add all cells above the selected cell, you don't need to change anything. To add cells from a different direction, change the formula to =SUM(BELOW), =SUM(LEFT) or =SUM(RIGHT).

Set the number format
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Step

Choose a number format, if needed. Without a number format selected, the formula's result appears without any formatting, akin to Excel's "General" formatting. Most of the time, you don't need to use a format. Word also lets you write your own format using the same system as in Excel. Click OK to finish the formula.

Formula to display 11, not 16, as the West total
credit: Image courtesy of Microsoft

Step

Refer to cell locations in a SUM function to add specific cells rather than an entire direction. Even though Word doesn't display row and column headings like Excel, it uses the same terminology: rows use numbers and columns use letters. For example, to add the cell three to the right, three down, and the cell below it, use the formula =SUM(C3:C4).

Insert an Excel Spreadsheet

Spreadsheet in a Word document
credit: Image courtesy of Microsoft

Another way to add cells in a Word document is to insert an Excel spreadsheet. Click Table on the Insert tab, as if inserting a table, but instead of choosing a table size, click Excel Spreadsheet. Inserted spreadsheets work exactly like spreadsheets in Excel, allowing you to simply type the function =SUM in the desired cell.