Try:

=IF(COUNT(D3:E3)<2,"",IF(AND(D3<=11/24,E3=11.5/24),E3-D3-0.5/24,IF(E3<D3,(16.5/24-D3)+(E3-6/24),E3-D3)))

Times as fractions of a day so 1 hour is 1/24th of a day ie 1/24 so 11:30 AM
is 11.5/24 etc

--
HTH

Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings


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"Mike Archer" wrote in message
...
Sandy - That is very helpful. I made a mistake though. I thought that if
someone provided me a formula, I would be able to figure out how it works,
therefore, I gave hypothetical times to keep the example simple. I am not
able to decypher your formula. Would you mind helping modify it for the
real
times?
The shift is 6:00 to 16:30, and lunch is 11:00 to 11:30.
--
Thanks,
Mike


"Sandy Mann" wrote:

Mike,

With the "Time In" in Cell D3 and the "Time Out" in E3 does:

=IF(COUNT(D3:E3)<2,"",IF(AND(D3<0.5,E30.5),E3-D3-1/24,IF(E3<D3,(17/24-D3)+(E3-6/24),E3-D3)))

do what you want?

--
HTH

Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings


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"Mike Archer" wrote in message
...
Hello. I want to calculate the time a production unit is in a
position.
The
operator should only have to enter "time in" and "time out". The
formula
should automatically deduct non-work hours. For example from 6:00 to
8:00
would be 2 hours (very simple). But from 11:00 to 14:00 would be 2
hours
also because there is a lunch from 12:00 to 13:00. From 16:00 to 7:00
should
be 2 hours also because shift ends at 17:00 and begins again at 6:00.
I
can't find an example to use for this. Please help if you can!
--
Thanks,
Mike