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Excel formula calculate difference in two datetimes, answer in hours and tenths (decimal)

Posted on 2011-09-15
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Last Modified: 2012-08-13
How can I create a new column that contains the difference between two datetime values, with the answer expressed in hours and tenths-of-hours?

Example:
Begin Date (in A1) = 6/9/2011  12:04:00 PM
End Date (in B1) = 7/1/2011  12:15:00 PM

Hours Spent = B1 - A1

The answer is 528:11 when I custom-format it with [hh]:mm , but I need it to show as 528.2 (decimal format).

Thanks in advance!
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Question by:notawahoo2
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Expert Comment

by:zorvek (Kevin Jones)
ID: 36543766
To display hours with a decimal or fractional part divide the value by 24 and format the result as a number as illustrated below.

   =A1/24

Kevin
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Accepted Solution

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barry houdini earned 500 total points
ID: 36543825
I think you need to multiply by 24 Kevin, so for the above try this formula

=(B1-A1)*24

format result cell as number with 1 decimal place

If you need result to be exact 10ths (and not just displayed that way) use ROUND, too, i.e.

=ROUND((B1-A1)*24,1)

regards, barry
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LVL 81

Expert Comment

by:zorvek (Kevin Jones)
ID: 36543830
Dang. Thanks Mr. Barry.
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Author Closing Comment

by:notawahoo2
ID: 36544015
So Simple!  

Thanks!!!
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