I've repeated this rant several times, but always willing to try do it again!

First of all, is your data an actual Excel "time" or a text string that
"looks" like a "time" ??
To find out, try changing the format of the cell.
if you're showing 20:22:16  and you change the cell format to 
h:mm:ss AM/PM

does it change to 8:22:16 PM ??

If it does NOT, then you don't have a true Excel "time", you have
a text string that LOOKS like a time.
you can't do math with text!!

Now, if it changes, then you have a true excel "time", and we can 
discuss that:

Excel does not know anthing about "date" or "time".

What it DOES know is the number of days and fractional part of days
since 1/1/1900.

So, tonight (9/3/2010) at 8:22:16 PM
is 40424.8487962963 since midnight of 1/1/1900.

So, when you do the subtrutions, you'll get the fractional
part of a DAY, you just need to convert it to yours
(24 hours/day)

so, the difference
20:22:16 - 20:02:49
is equivalent to:
40,424.8487962963 -  40,424.8352893519 

which is:
is 19 minutes, 27 seconds,
or
0.0135069444440887 days * 24  hours / day = 

 0.3241666667 hours

does that help?

Paul




________________________________
From: JohnA <johnasmit...@gmail.com>
To: MS EXCEL AND VBA MACROS <excel-macros@googlegroups.com>
Sent: Thu, September 2, 2010 2:11:03 PM
Subject: $$Excel-Macros$$ Formula for Military Time Calculations

I need to determine time increments from postings in Excel in the 24
hour mode (commonly called military time).

I can't come up with a formula to give me decimal hours from military
time subtractions.

Help please!

JohnA

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