format the cell as [h]:mm:ss

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HTH

Bob

"NDBC" wrote in message
...
I would like to set up a timer that can go over 24 hours. I currently have
a
timer that uses now()-start time but this goes back to 0 after 24hrs. Is
it
possible in Excel to get a timer that will show say 25:00:00 at the 25
hour
mark.

Thanks