Select a range, such as a row, and then use AutoSum to automatically sum all values in the row. You also can click an empty cell near the row, and then allow AutoSum to estimate the expected range.

If you don't have an existing file, use the blank worksheet in Excel. Type a zero in the first row of your column and drag your mouse down to the last row of the column to autofill it with zeros.

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.

The Autosum function can be used to add or sum Time in Microsoft Excel. You can add hours and calculate the total time in Excel.