Click in a cell that should contain the sum of the rows. Click the topic or topics below that interest you. It is easy and fast to insert a formula to the Word table that use the values of some table cells.
If you have a table in the Word document you can insert some formulas and functions in it without using an Excel table.
To add a formula into the Word table see How to calculate formulas in a Word document if you need to use formulas without tables do the following. Head to the Layout tab and click the Formula button again. Use a formula in a Word or Outlook table In this article. Insert a formula in a table cell.