easy formula question

  • Thread starter Thread starter j lunis
  • Start date Start date
J

j lunis

How do I perform math calculations on time increments?

For example, 7 * 20 minutes = 2 hours, 20 minutes (2:20),
and 3 hours - 1 hour ten minutes = 1 hour, 50 minutes (1:50).

I know how to format cells to show time but I can't find how to
calculate an answer that shows up as time.
 
The time is actually a fraction of a day. Replace 20 (minutes) with
20/60/24, since there are 60 minutes in an hour and 24 hours in a
day. 3 x 20/60/24 should give 1:00 when formatted as time.

Good luck

Ken
Norfolk, Va
 
If you have true Excel time values entered then it's just straight math:

A1 = 0:20 (h:mm format)

=A1*7 (format as h:mm)

A2 = 3:00 (h:mm format)
B2 = 1:10 (h:mm format)

=A2-B2 (format as h:mm)
 
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