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Calculating difference in time after midnight

  1. 12-14-2013, 05:50 PM #1
    alan peele
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    Unhappy Calculating difference in time after midnight

    Hi Everyone; I'm hoping you can help me.
    I'm trying to calculate the available man hours I have for my shift/team. I have got the basic formula to deduct the time, and lost time for breaks ok, but when the shift end time crosses midnight the formula returns a "value" error message. i.e. start time = 18:00. End time = 24:00 breaks = 15 mins gives me a formula like this =TEXT(O17-N17-P17,"h:mm") and a result of 5:45
    Any ideas how I can make this formula work so it can calulate the variance even though the shift ends at 02:00am the following morning?
    Any thoughts gratefully received.
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  2. 12-14-2013, 05:55 PM #2
    shg
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    Re: Calculating difference in time after midnight

    =MOD(O17-N17-P17, 1) and format as h:mm
    Entia non sunt multiplicanda sine necessitate
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  3. 12-14-2013, 06:15 PM #3
    alan peele
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    Re: Calculating difference in time after midnight

    Excellent, thanks very much, that worked perfectly.
    The last part of the sum is to multiple the result from that formula by the number of people I have on shift. Keeping the format as h:mm means the result corrupts once it reaches 24:00. Is there a way of maintaining the integrity of your answer but allowing the result to SUM to give me a total number of hours available? (on average I have 20 people per shift.
    Thanks for the help
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  4. 12-14-2013, 07:07 PM #4
    shg
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    Re: Calculating difference in time after midnight

    Format as [h]:mm
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  5. 12-15-2013, 07:56 AM #5
    alan peele
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    Re: Calculating difference in time after midnight

    Excellent. That works really well. I think I can build the rest of this tool now.
    My team and I thank you very much.
    Merry Christmas
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  6. 12-16-2013, 02:01 AM #6
    arlu1201
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    Re: Calculating difference in time after midnight

    Based on your last post in this thread, its apparent that you are satisfied with the solution(s) you've received and have solved your question, but you haven't marked your thread as "SOLVED". I will do it for you this time.

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