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Calculate Working Hours In Reverse

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Problem: Every day I come in to work and intend to work eight hours. If I come in at 8:30 AM, and given an hour lunch, what time do I need to leave to work exactly eight hours?

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Time difference testing

After reading some of the comments on Calculate Working Hours in VBA, I went back and reworked the TimeDiff function. Below is the new and improved WorkingHoursDiff function!

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Calculate Working Hours in VBA

(Update 3/25/2009: See Time Difference Testing for an updated version of the code found below.)

In the spirit of my last post Calculate Working Days Minus Holidays in VBA, here is a function I wrote recently that returns the number of working hours between two date/time values passed to the function as arguments. It is self-contained and works independently of whatever existing code you have, so it is a true "drop-in" code you can use anywhere you need it.

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Site last updated: February 9, 2012