If you need to sum a column or row of numbers, let Excel do the math for you. Select a cell next to the numbers you want to sum, click AutoSum on the Home tab, press Enter, and you're done. When you click AutoSum, Excel automatically enters a formula (that uses the SUM function) to sum the numbers.

How do I add up a column in Excel?

To insert a single column: Right-click the whole column to the right of where you want to add the new column, and then select Insert Columns. To insert multiple columns: Select the same number of columns to the right of where you want to add new ones. Right-click the selection, and then select Insert Columns.

What is the formula for AutoSum?

AutoSum. Use AutoSum or press ALT + = to quickly sum a column or row of numbers. 1. First, select the cell below the column of numbers (or next to the row of numbers) you want to sum.