It is 7 days a week, however the start and end datetime may be outside the range of 8am to 8pm, and can be over multiple days...
I could only get your formula to work within 1 day and within 8am to 8pm - but when i inputed 4/16/2010 08:00 to 4/18/2010 07:00 it returned "12:00" instead of 24
I believe this works, and expect it can be simplified:
=(INT(A2) - CEILING(A1,1) + 1) * ("20:00"-"08:00") - MEDIAN(MOD(A1,1), "20:00", "8:00") + MEDIAN(MOD(A2,1), "20:00", "8:00")
Entia non sunt multiplicanda sine necessitate
Apologies on my part - I should have tested
Another variation of shg's approach might be:
=((INT(A2)-INT(A1))*("20:00"-"08:00"))-MEDIAN(MOD(A1,1),"20:00","8:00")+MEDIAN(MOD(A2,1),"20:00","8:00")
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Actually, vice versa -- mine was a variation of yoursAnother variation of shg's approach might be:
nice sgh.. i think that will do it
i'll keep testing and let you know if I encounter any weird numbers but so far so good
rock on!
I recommend DO's -- it's more compact and easier to understand.
Donkey that seems to work as well
nice job guys, i've been slaving over this for hours...much appreciated
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