How to Calculate Average by Date in Excel

You can use the following formula to calculate the average value by date in an Excel spreadsheet:

```=AVERAGEIF(A1:A10, C1, B1:B10)
```

This particular formula calculates the average value in the cell range B1:B10 only where the corresponding cells in the range A1:A10 are equal to the date in cell C1.

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

Example: Calculate Average by Date in Excel

Suppose we have the following dataset that shows the sales of some product on various dates:

Now suppose we’d like to calculate the average sales value by date.

To generate a list of unique dates, we can use the following formula:

`=SORT(UNIQUE(A2:A15))`

We’ll type this formula into cell D2:

By default, Excel converts the date to the number of days since 1/1/1900.

To convert these numbers to a recognizable date format, simply highlight the cell range D2:D6, then click the format dropdown arrow and click Short Date:

The dates will be converted to a recognizable date format:

Next, we can use the following formula to calculate the average sales by date:

`=AVERAGEIF(\$A\$2:\$A\$15, D2, \$B\$2:\$B\$15)`

We’ll type this formula into cell E2, then copy and paste it into each remaining cell in column E:

From the output we can see:

• The average sales on 1/4/2022 is 5.
• The average sales on 1/7/2022 is 6.333.
• The average sales on 2/7/2022 is 6.333.

And so on.