The **SUMPRODUCT** function in Excel returns the sum of the products of two arrays.

You can use the following basic syntax to use the **SUMPRODUCT** function across multiple sheets:

=SUM(SUMPRODUCT(Sheet1!A2:A11, Sheet1!B2:B11), SUMPRODUCT(Sheet2!A2:A6, Sheet2!B2:B6), SUMPRODUCT(Sheet3!A2:A9, Sheet3!B2:B9))

This formula performs a **SUMPRODUCT** calculation across specific ranges in the sheets named **Sheet1**, **Sheet2**, and **Sheet3** and then takes the sum of the three values.

The following example show how to use this syntax in practice.

**Example: How to Use SUMPRODUCT Across Multiple Sheets**

Suppose we have the following three sheets in an Excel workbook:

**Sheet1:**

**Sheet2:**

**Sheet3:**

We can use the following formula to calculate the **SUMPRODUCT** between columns A and B in each sheet individually and then add the sum of all three values:

=SUM(SUMPRODUCT(Sheet1!A2:A11, Sheet1!B2:B11), SUMPRODUCT(Sheet2!A2:A6, Sheet2!B2:B6), SUMPRODUCT(Sheet3!A2:A9, Sheet3!B2:B9))

The following screenshot shows how to use this formula in practice:

The value for the **SUMPRODUCT** across all three sheets turns out to be **355**.

If you use the **SUMPRODUCT** in each sheet individually, you’ll end up with the following values:

**Sheet1**SUMPRODUCT of A and B columns: 184**Sheet2**SUMPRODUCT of A and B columns: 25**Sheet3**SUMPRODUCT of A and B columns: 146

The sum of these three values is: 184 + 25 + 146 = **355**.

This matches the value that we calculated using one formula.

**Note**: You can find the complete documentation for the **SUMPRODUCT** function in Excel here.

**Additional Resources**

The following tutorials explain how to perform other common tasks in Excel:

How to Use SUMPRODUCT with Values Greater Than Zero in Excel

How to Sum Across Multiple Sheets in Excel

How to Sum Filtered Rows in Excel