Microsoft Access Date/Time Differences
How Much Time Has Elapsed Between Two Dates/Times. Employee Timesheets.
Q: I have a timesheet table with TimeIN and TimeOUT for
each employee. How can I calculate the HoursWorked?
A: Working with times and
dates in Access is easy once you know that each DAY has a value of ONE.
So if you add 1 to 1/1/1990, you get 1/2/1990. If you add 0.5 to
1/1/2004 you get 1/1/2004 12:00 (which is HALF a day). If you need to
figure out the difference between two times, just subtract them. That
will give you the difference IN DAYS between those two dates. If it's a
fraction, you're dealing with HOURS, just multiply by 24. Here's an
Here is a FREE VIDEO TUTORIAL
that will walk you through an example of working with date and time
much easier to show you how it's done than to explain it here.
I teach the concepts in this free mini tutorial in my
Access 206 course. These are
full courses - over 60 minutes in length each. I spend a lot more time going
over how to do this, in addition to lots more tips and tricks.
>>> Also, see my other Tip on
calculating the number of months
someone has been alive using the DateAdd and DateDiff
By Richard Rost
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