A **cumulative average** tells us the average of a series of values up to a certain point.

The following step-by-step example shows how to calculate a cumulative average for a dataset in Excel.

**Step 1: Enter the Data**

First, let’s enter the values for a given dataset:

**Step 2: Calculate the First Cumulative Average Value**

Next, we can use the following formula to calculate the first cumulative average value:

=AVERAGE($A$2:A2)

**Step 3: Calculate the Remaining Cumulative Average Values**

Next, we can simply copy and paste this formula down to the remaining cells in column B:

We would interpret the cumulative average values as:

- The cumulative average of the first value is
**3**. - The cumulative average of the first two values is
**4.5**. - The cumulative average of the first three values is
**3**.

And so on.

**Step 4: Plot the Cumulative Average Values**

We can plot the cumulative average values by highlighting every value in column B, then clicking the **Insert** tab along the top ribbon, then clicking **Insert Line Chart**:

**Additional Resources**

How to Find Moving Averages in Excel

How to Find Weighted Moving Averages in Excel