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 …

One quick and easy way to add values in Excel is to use AutoSum. Just select an empty cell directly below a column of data, then on the Formula tab, select AutoSum > Sum.

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, select AutoSum on the Home tab, press Enter, and you're done.

How to use the SUM function in Excel to add individual values, cell references, ranges, or a mix of all three.

To insert a column, pick any cell in the table and right-click. In the example shown below for rows, a row will be inserted above row 3. For columns, if you have a cell selected in the table's rightmost column, …

Insert a new column into the table. You can do this by typing in the column immediately to the right of the table, and Excel will automatically extend the table for you.

To add a list of numbers, select the cell below a column of numbers, and then click AutoSum.

With Power Query, you can add an Index or Custom (you define the formula) column to your current query.

When you create an Excel table, Excel assigns a name to the table, and to each column header in the table. When you add formulas to an Excel table, those names can appear automatically as you enter …

When your data is in a table, then as you add or remove items from the list, any drop-downs you based on that table will automatically update. You don't need to do anything else.