If you’ve ever had to sum up items across many different sheets, then you know it can be a real pain when there are a lot of sheets. This trick will make it super easy.

In this example, we have a table of sales figures each in a separate tab named **Jan** through **Dec**. Each sheet is the same format with the table in the same position within each sheet.

If you wanted to create a **Total** sheet and have a table in it that sums up each of the tables in the **Jan** to **Dec** sheets, then you could use this formula and copy it across the whole table.

`=Jan!C3+Feb!C3+Mar!C3+Apr!C3+May!C3+Jun!C3+Jul!C3+Aug!C3+Sep!C3+Oct!C3+Nov!C3+Dec!C3`

Creating this formula isn’t very efficient though, as it requires selecting the **Jan** sheet, then selecting the cell **C3**, then typing a **+**, then selecting the **Feb** sheet etc… Going through 12 sheets in all. There is a better way!

Add the sum formula into the total table.

- Type out the start of your sum formula
**=SUM(**. **Left click**on the**Jan**sheet with the mouse.**Hold Shift**key and**left click**on the**Dec**sheet. Now select the cell**C3**in the**Dec**sheet. Add a closing bracket to the formula and press**Enter**. Your sum formula should now look like this.`=SUM(Jan:Dec!C3)`

The formula will sum up **C3** across each of the sheets Jan to Dec. You can also use this technique with other formulas like COUNT or AVERAGE etc… An easier way over cycling through each sheet individually.

This is also referred to as 3D formulas. Tiling worksheets or workbooks side by side is the quickest and less confusing method to use when doing this.