The formula is OK, though you could have omitted one unnecessary pair of
brackets and used
=IF(ISBLANK(B1),1,NETWORKDAYS(A1,B1))
The answer from NETWORKDAYS with those inputs is 1, however.
--
David Biddulph

"Dave" wrote in message
...
What I want the formula to do is when a start date is entered and no end
date for the cell to display a 1. If both a start date and end date is
entered then use the networkdays function to calculate the days.

I've applied this formula without success: =IF((ISBLANK(B1)),1,
networkdays (A1,B1))

Whe A1=24/02/2006, B1=26/02/2006
Therefore the formula should calculate the networkdays=2.

If A1=24/02/2006, B1=ISBLANK Then the formula should calculate =1.

Does anyone have any ideas to make this work.