Thanks for the reply; I like this approach the best!

>Do you mean such as the following:
>
>1) Project started on Thursday at 3:30 PM
>2) Project finished Next Tuesday at 10:00 AM?
>...how many (work) hours was project's duration?
>
>How about:
>1. (StartDay)@5:00 PM - (Startday)(Starttime)
>2. Now add all intervening full days as 8 hours (assuming no OT)
>3. Then take: (FinishDay)(FinishTime)-(FinishDay)@8:00 AM...
>4. Add 'em all up...
>
>This is similar to Hilmar's response but within the time frame of 9 to 5
>
>HTH,