Excel 2010 : Find seconds between two date time

Question

I have a column Cal Date time, which contains the date and time of the call as shown below.

A       B                           C           D
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Answer 1

Alright, you need to format a cell as custom like this:

Then use this formula in it

=DATEVALUE(RIGHT(LEFT(B3,10),2)&"/"&RIGHT(LEFT(B3,7),2)&"/"&LEFT(B3,4))+TIMEVALUE(RIGHT(LEFT(B3,13),2)&":"&RIGHT(LEFT(B3,16),2)&":"&RIGHT(B3,9))

Where B3 is your text data.

you can do a simple subtract after that