Not sure, but try in S2: =IF(COUNT(G2,L2)<2,"",(L2-G2)/7)
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Rgds
Max
xl 97
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Singapore, GMT+8
xdemechanik
http://savefile.com/projects/236895
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"Jack" wrote in message
...
In a chart where columns G and L are used to record the entry and exit
dates,
column S reflects the number of weeks (difference). I used the formula
=(L-G)/7. This formula works when dates are entered in columns G and L.
However, if either cell is empty, I get the "value" error message. How
can I
revise the formula that produces a 0 if columns G and L arte empty?

Thanks