Number of working hours between two times

ramble_boy

New Member
Joined
Sep 25, 2006
Messages
2
Hi there,

I'm having a problem in Excel 2002. I have two columns with dates and times in (a 'start date & time' and an 'end date & time') and need to calculate the number of working hours between the start and end date/times. Working times are set (8am - 7:30pm) and weekends and bank holidays should not be included (as in the 'networkdays' function). For example, if the start time was 22/09/06 14:00 and the end time was 25/09/06 10:20, the result I would be looking for would be 07:50 or "7hrs 50 minutes". Actually, it would be useful to have it as a straight 'number of hours' - 7.83(ish) hours in the example above.

The start and end times are not necessarily within the working hours, and might even be on weekends or bank holidays (so if start and end times were on the same weekend, there would be zero working hours between them).

If anyone can help it would be much appreciated.

Many thanks in advance,
Ramble_boy
 

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barry houdini

MrExcel MVP
Joined
Mar 23, 2005
Messages
20,825
hi ramble_boy, welcome to the board.

This is a little tricky when your times can be at weekends or evenings but this formula should accommodate that

=((NETWORKDAYS(A3,B3)-1)*(J$4-J$3)+IF(NETWORKDAYS(B3,B3),MEDIAN(MOD(B3,1),J$4,J$3),J$4)-IF(NETWORKDAYS(A3,A3),MEDIAN(MOD(A3,1),J$4,J$3),J$3))*24

format as general

where A3 contains start date/time, B3 contains end date/time, J3 contains weekday start time, e.g. 08:00 and J4 contains weekday finish time, e.g. 19:30.

If you want a holiday range then list those somewhere on the worksheet and include as the 3rd argument of each of the NETWORKDAYS functions
 

ramble_boy

New Member
Joined
Sep 25, 2006
Messages
2
Thanks very much Barry, that looks like exactly what I'm looking for. I've just slotted it into one of my spreadsheets and it seems to be working perfectly.

Thanks again,
Ramble_boy
 

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