DateDiff function pulling wrong time duration

In my query Im attempting to calculate the exact time duration from clockin to clockout

I'm using this function to calculate the Duration field:
Duration: DateDiff("h"[clock_in_datetime],[clock_out_datetime])

The output for this is round numbers.  Is this avoidable?  I need the increments as well.

Clock_In_Datetime         Clock_Out_Datetime      Duration
9/3/2008 2:25:00 PM       9/3/2008 7:27:00 PM     5.00
9/3/2008 5:00:00 PM       9/3/2008 7:39:00 PM      2.0                                                                                
9/3/2008 5:03:00 PM       9/3/2008 8:22:00 PM      3.00
9/3/2008 5:13:00 PM       9/3/2008 8:27:00 PM      3.00
9/3/2008 6:35:00 PM       9/3/2008 10:14:00 PM    4.00                          
9/3/2008 8:11:00 PM       9/4/2008 1:34:00 AM      5.00

thanks



Cole100IT Systems ManagerAsked:
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tbsgadiCommented:
Hi Cole100,

You can use minutes "n"
http://www.techonthenet.com/access/functions/date/datediff.php

Good Luck!

Gary
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dportasCommented:
DATEDIFF counts the number of time "ticks" between the two times in whatever sized units you specify. So if you want to be more precise you could select the units to be minutes or seconds and then divide the result by 60 or 3600.
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Cole100IT Systems ManagerAuthor Commented:
Using "n" gets total minutes.  I need hours rounded to the .1

clockin      clockout     duration (hrs)
4:00pm      8:30pm           4.5

thank you.

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Cole100IT Systems ManagerAuthor Commented:
dportas:

I should have caught that.  Thanks very much.  That got it.

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