Custom format your cell(s):

[h]:mm

The brackets prevent the hours from rolling over into days.
--

HTH,

RD
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Please keep all correspondence within the Group, so all may benefit!
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"John Knoke" wrote in message
...
I calculating "uptimes" of machines.
If I have a 100 machines that can work 24 hours it means I have
2400 machine hours of productivity.
I am not able to display 2400:00
tks for any help