You can use the following formula to calculate a weighted percentage in Google Sheets:

=SUMPRODUCT(A:A, B:B)/SUM(B:B)

This formula assumes column **A** contains the percentage values and column **B** contains the weights.

The following example shows how to use this formula in practice.

**Example: Weighted Percentage in Google Sheets**

Suppose we have the following dataset that shows the scores that some student received on various exams along with the weights for each exam:

We can use the following formula to calculate a weighted percentage for their final grade in the class:

=SUMPRODUCT(B2:B6, C2:C6)/SUM(C2:C6)

The following screenshot shows how to use this formula:

Click the **Format as percent** button to convert this decimal to a percentage:

The value will automatically be formatted as a percentage:

The final grade turns out to be **85%**.

We can verify that this is correct by manually calculating the weighted percentage of grades:

- Weighted Percentage: (90%*10%) + (91%*10%) + (81%*10%) + (78%*10%) + (85%*60%)
- Weighted Percentage: 9% + 9.1% + 8.1% + 7.8% + 51%
- Weighted Percentage =
**85%**.

This weighted percentage matches the value that we calculated using the formula from earlier.

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

**Additional Resources**

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

How to Calculate Frequencies in Google Sheets

How to Calculate Cumulative Percentage in Google Sheets