Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Calculating Elapsed Time with Excluded Periods.

Calculating Elapsed Time with Excluded Periods

by Allen Wyatt
(last updated March 21, 2016)

Mahesh can figure out how to calculate the difference between two dates and times in minutes. However, he would like to calculate the difference in minutes, yet exclude the hours between 5:00 pm and 8:00 am as well as excluding everything between 5:00 pm Friday to 8:00 am Monday. For example, if the first date is 02/18/09 6:00 pm and the end date is 02/19/09 9:00 am, the correct result should be 60 minutes. Mahesh wonders if this possible to do with a formula.

As should be obvious, a formula to achieve the desired result could be very complex. Many subscribers provided different solutions, including some great user-defined functions. Rather than focus on all of them, I figured I would just jump right to the most elegant (shortest) formula and suggest using it.

Assume that your starting date/time was in cell A1 and the ending date/time was in cell B1. Given these you could use the following formula:

=(NETWORKDAYS(A1,B1)-1)*("17:00"-"08:00")
+IF(NETWORKDAYS(B1,B1),MEDIAN(MOD(B1,1),"17:00"
,"08:00"),"17:00")-MEDIAN(NETWORKDAYS(A1,A1)
*MOD(A1,1),"17:00","08:00")

This is a single formula; it returns an elapsed time. This means that you will need to format the cell to show elapsed time. If you prefer to have the result as a regular integer, then you should use this version of the formula, instead:

=((NETWORKDAYS(A1,B1)-1)*("17:00"-"08:00")
+IF(NETWORKDAYS(B1,B1),MEDIAN(MOD(B1,1),"17:00"
,"08:00"),"17:00")-MEDIAN(NETWORKDAYS(A1,A1)
*MOD(A1,1),"17:00","08:00"))*1440

The change (multiplying the original result by 1440) results in a number of minutes rather than an elapsed time. The value 1440 is derived by multiplying 60 by 24 to get the number of minutes in a day.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (5399) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Calculating Elapsed Time with Excluded Periods.

Author Bio

Allen Wyatt

With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He  is president of Sharon Parq Associates, a computer and publishing services company. ...

MORE FROM ALLEN

Reveal Codes in Word

While there are no true Reveal Codes in Word, as in WordPerfect, as they are vastly different word processors, there is a ...

Discover More

Adding a Custom Format to those Offered by Excel

Adding a custom format to Excel is easy. Having that custom format appear in all your workbooks is a different story ...

Discover More

Returning Least-Significant Digits

Do you ever have a need to return just a few digits out of a number? This tip shows different formulas you can use to return ...

Discover More

Comprehensive VBA Guide Visual Basic for Applications (VBA) is the language used for writing macros in all Office programs. This complete guide shows both professionals and novices how to master VBA in order to customize the entire Office suite for their needs. Check out Mastering VBA for Office 2010 today!

More ExcelTips (menu)

Adjusting Times for Time Zones

Collect a series of times in a worksheet, and you might need to adjust those times for various time zones. This involves a ...

Discover More

Dealing with Large Numbers of Seconds

When adding values to a time to calculate a new time, you may naturally choose to use the TIME function. This can cause some ...

Discover More

Rounding to the Nearest Quarter Hour

When entering times in a worksheet, you may have a need to round whatever you enter to the nearest 15-minute increment. There ...

Discover More
Subscribe

FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."

View most recent newsletter.

Comments

If you would like to add an image to your comment (not an avatar, but an image to help in making the point of your comment), include the characters [{fig}] in your comment text. You’ll be prompted to upload your image when you submit the comment. Images larger than 600px wide or 1000px tall will be reduced. Up to three images may be included in a comment. All images are subject to review. Commenting privileges may be curtailed if inappropriate images are posted.

What is six less than 6?

There are currently no comments for this tip. (Be the first to leave your comment—just use the simple form above!)


This Site

Got a version of Excel that uses the menu interface (Excel 97, Excel 2000, Excel 2002, or Excel 2003)? This site is for you! If you use a later version of Excel, visit our ExcelTips site focusing on the ribbon interface.

Newest Tips
Subscribe

FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."

(Your e-mail address is not shared with anyone, ever.)

View the most recent newsletter.