Calc difference between two times

[ibiubu]

EDITED

Here is what I got to work that was able to calc the difference between a start and stop time field to determine the time spent on the task.

Round(

Hour( Stop - Start ) + Minute( Stop - Start) / 60,

2)

+

If(

Stop <= Start,

24,

0)

Larry

[RalphL]

Make the calculation field a number field. It will now give you the number of seconds for the difference. Divide this by 3600 second/hour to get the time in hours and a decimal fraction. You can use the round fuction to get it to the nearest 2 places.