Excel: Calculate Difference Between Two Times in Seconds

You can use the following formula to calculate the difference between two times in seconds in Excel:


This particular formula calculates the difference (in seconds) between the times in cells B2 and A2.

By default, the formula B2-A2 would return the difference between cells B2 and A2 in terms of days.

Since there are 86,400 seconds in a day, we must multiply the result of B2-A2 by 86,400 to get the difference in terms of seconds instead of days.

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

Example: Calculate Difference Between Times in Seconds in Excel

Suppose we have the following two columns in Excel that show the start and end times for some events:

We can type the following formula into cell C2 to calculate the difference between the start and end time for the first row in terms of seconds:


We can then drag and fill this formula down to each remaining cell in column C:

Excel difference between two times in seconds

The values in column C display the difference in seconds between the Start Time and End Time for each row.

For example:

  • There are 1,140 seconds between 1/1/2022 12:15 PM and 1/1/2022 12:34 PM.
  • There are 18,120 seconds between 1/3/2022 4:13 AM and 1/3/2022 9:15 AM.
  • There are 6,480 seconds between 1/15/2022 10:56 AM and 1/15/2022 12:44 PM.

And so on.

Additional Resources

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

How to Calculate Average Time in Excel
How to Plot Time Over Multiple Days in Excel
How to Add & Subtract Hours from Time in Excel

Leave a Reply

Your email address will not be published. Required fields are marked *