Time math in Access

dgravitt
dgravitt used Ask the Experts™
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I have a field that is a sum of time formatted hh:nn:ss. The time represents time out. I need to get a percentage of availability over 59 days, which should be 1416:00:00 hours. So I need 1416;00:00-totaltime/1416:00:00. Can't seem to get this to work correct from an Access query. I'm sure it's a syntax issue.
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Distinguished Expert 2017
Commented:
I'm not sure I understand what you are looking for but a DateTime field represents a point in time, not an accumulation of time.  Access will only show up to 24 hours if you are trying to format the DateTime field.  If you need something different, you will need to create your own function.  Dates are stored as double precision numbers with the whole number being the number of days since 12/30/1899 and the decimal counting time since midnight.

print now()
7/21/2016 2:01:31 PM
print cdbl(#7/21/2016 2:01:31 PM#)
 42572.5843865741

so 2:01:31 = .5843865741 and 42572 = 7/21/2016

Once you add more than 24 hours, you start increasing the integer

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Commented:
thanks

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