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Old 02-11-2011, 04:40 AM
Colin Legg's Avatar
Colin Legg Colin Legg is offline Windows 7 32bit Office 2010 32bit
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Join Date: Jan 2011
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Assuming that all dates are working days (as implied in your question), the formula would be

Code:
=(B1-A1)*8/24
Where A1 contains the start date and B1 contains the end date.
The cell containing the formula should be custom formatted as [hh]:mm
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