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cannot get formula right to subtract time using if

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    cannot get formula right to subtract time using if

    I have a column titled "event start time"(A1), a column titled " event end time" (B1) and a column titled " total event hours" (C1).
    I have the third cell formulated to return the difference in hours, but I'm looking for help with a formula to calculate if the hours = 8 or more, to automatically deduct one hour for break.
    If the time is less than 8 hours, to do nothing but just return the actual difference.
    please help.

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    Re: cannot get formula right to subtract time using if

    Maybe this?

    =IF((B1-A1)>8,B1-A1-1,B1-A1)
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    Re: cannot get formula right to subtract time using if

    that still just returns 9:00 for me.
    When A1 is 08:30 and B1 is 17:30.
    (I have it all formatted as military time)

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    Re: cannot get formula right to subtract time using if

    Attach a sample workbook, please.

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    Re: cannot get formula right to subtract time using if

    Try this:

    =B1-A1-IF(B1-A1>TIME(8,0,0),TIME(1,0,0),0)

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    Re: cannot get formula right to subtract time using if

    Here's the sample
    Attached Files Attached Files

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    Re: cannot get formula right to subtract time using if

    Sorry! Try this:

    =IF(TEXT(B1-A1,"hh:mm")>8,B1-A1-VALUE("01:00"),B1-A1)

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    Re: cannot get formula right to subtract time using if

    Try

    =IF((B1-A1)>8/24,(B1-A1)-1/24,B1-A1)

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    Re: cannot get formula right to subtract time using if

    @63falcondude
    this seems to be working, but when I copied the formula down, it returned a #VALUE! for only one of the cells. argghh.
    I'll figure that out eventually.
    thank you!

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    Re: cannot get formula right to subtract time using if

    You're welcome. Thanks for the rep!

    There is a space in H22. Delete that and it will be working as intended.

    If that solved your question, please mark this thread as SOLVED.

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    Re: cannot get formula right to subtract time using if

    Also, if you want to clean the worksheet up a bit, you can add this (in red) to the existing formula:

    =IF(H2&I2="","",I2-H2-IF(I2-H2>TIME(8,0,0),TIME(1,0,0),0))

    The formula will return blank if there is nothing in the start or end times.

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    Re: cannot get formula right to subtract time using if

    perfect! thank you!

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    Re: cannot get formula right to subtract time using if

    You're welcome. Glad we could help.

    Welcome to the forum.

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