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Best way to calculate total hours between two text times?

Posted on 2012-03-30
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Last Modified: 2012-03-30
Hello,

I have two time fields. One being the beginning time and other being the ending time

Both times are in 24 hour format and in text format

Eg:

Beginning            Ending
10:22                     15:38

I want to know what is the best way in calculating the time in-between in hours?

eg: a 330 minutes difference would be noted as 5.5 hours, etc

Thank you for your help!
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Question by:Shanan212
6 Comments
 
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Expert Comment

by:Anuroopsundd
ID: 37788289
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LVL 81

Expert Comment

by:byundt
ID: 37788309
If you use text that looks like numbers in an arithmetic formula, it is converted into a real number. So you could calculate the hours difference as:
=24*MOD(B2-A2,1)

The business with MOD allows you to span midnight.

The multiplication by 24 is because times are stored as fractions of a day, so 12:00 noon is 0.5
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LVL 27

Assisted Solution

by:Glenn Ray
Glenn Ray earned 400 total points
ID: 37788311
If the two text values are in cells A2 (beginning) and B2 (ending), then insert the following formula in cell C2:
=TIMEVALUE(B2)-TIMEVALUE(A2)

You then need to format that cell using "h:mm" to convert the value into hours and minutes.
Right-click on the cell, click Format Cells, select "Custom" from the menu on left, enter "h:mm" in the Type box (do not use quotes.

-Glenn
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LVL 81

Accepted Solution

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byundt earned 1600 total points
ID: 37788319
If you want to display a blank until both times have been entered, you might use:
=IF(COUNTA(A2:B2)<2,"",24*MOD(B2-A2,1))

COUNTA returns the number of cells containing text or numbers.
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LVL 27

Assisted Solution

by:Glenn Ray
Glenn Ray earned 400 total points
ID: 37788327
Noting byundt's point about crossing midnight:

If that is a possibility, then my original formula should be changed to the following:
=IF(TIMEVALUE(B3)-TIMEVALUE(A3)<0,TIMEVALUE(B3)+1-TIMEVALUE(A3),TIMEVALUE(B3)-TIMEVALUE(A3))

-Glenn
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LVL 13

Author Closing Comment

by:Shanan212
ID: 37788357
Thank you!<br /><br />byundt's solution provides 1.78 hours rather than 1:47 (1hr 47 mins) that Glen was able to provide.<br /><br />I require 1.78 hours to find salary.<br /><br />Regardless, valuable lessons from Glen as well!<br /><br />Thank you all!
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