How to Do the Sum of an Indefinite Series in Excel. The Microsoft Excel program includes a variety of mathematical formulas that you can apply to any cell in a spreadsheet. If your business uses ...

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

Formula Click inside the cell that will hold the sum of the row. Type the following SUM formula in the selected cell or in the Formula bar at the top of the spreadsheet.

We have explained a step-by-step method to sum hours in Google Sheets in this article. How do you calculate time duration?