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How to average timestamps of day in Excel?

Author: Kelly Last Modified: 2024-08-27

For example, you have recorded the login timestamps of every time a specific user accessed a website in Excel as following screen shot show, and now you want to average these timestamps for predicting the most possible time this users will access the website in future, how could you get it done? Here I will introduce two ways to average timestamps of days in Excel.

a screenshot of the timestamps

Average timestamps of days with a help column in Excel
Average timestamps of day with an array formula in Excel

Average timestamps of days with a help column in Excel

We can calculate the time of every day in a help column, and then average the time in the help column easily in Excel. You can do as follows:

1. Besides original Timestamps column, type the word “Time” into the Cell B1, enter =A2-INT(A2) into Cell B2, and then drag its Fill Handle to the Range B2:B6. See screen shot:
a screenshot of using formula to convert timestamps to time

Note: In the formula of =A2-INT(A2), A2 is the first timestamp in Timestamps column, and you can change it based on your needs.

2. Keep selecting the time cells in the help column, and then format them as time with clicking the arrow a screenshot of the drop-down arrow width= in Number Format box > Time on Home tab. See screen shot:
a screenshot of change the formula results to Time format

3. Select the blank cell below help column, in our case select Cell B7, enter the formula =AVERAGE(B2:B6) into it and press the Enter key.
a screenshot of using formula to calculate the average of a timestamp

Now you will get the average time of these timestamps of days at once.

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Average timestamps of day with an array formula in Excel

Actually, we can apply an array formula to average timestamps of days directly in Excel. You can do as follow:

1. Select any blank cell, says Cell B4, enter the formula =AVERAGE(--TEXT(A2:A6-INT(A2:A6),"h:mm")), and then press the Ctrl + Shift + Enter keys simultaneously.
a screenshot of averaging timestamps of day with an array formula

2. Then format the average result to time format with selecting the Cell B4 and clicking the arrow a screenshot of the drop-down arrow 2 in Number Format box > Time on Home tab.  See screen shot:
a screenshot of changing the formatting of the formula result cell to Time

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