MS Project has this functionality built in. Just FYI.

Have you checked out
http://www.cpearson.com/excel/overtime.htm

http://www.cpearson.com/excel/DateTimeWS.htm

For the second link, you can define the working hours period to be
your defined higher billing rate period.

--JP


On May 27, 7:11 pm, Tim <Tim @discussions.microsoft.com wrote:
I am trying to calculate the time for a time sheet and billing purposes. i
need to know the hours between 7pm and 7am

Currently we are using standard time sheets ex. Start: 7:00 end 20:30... i
need to know and seperate out the time between 1900 and 20:30 to get in
another cell for a higher billing rate. the higher billing rate is from 1900
to 700 or 7PM to 7am ...