To get the total number of days from Input gate to Date Closed, the formula
=P2-G2 will do.
If you particularly want to use DATEDIF, then use =DATEDIF(G2,P2,"d")

Your second question isn't clear, but if you are saying that while P2 is
blank you want to use today's date in your W2 calculation, then try
=IF(P2="",TODAY(),P2)-G2
--
David Biddulph

"Taryn" wrote in message
...
Hi...I have a worksheet where dates are manually inputed. The columns are
labeled Input date (G2) and Date Closed (P2). The final column is
labelled
Total Dates Open (W2) 1- What is the correct format I should use if I use
the
Dateif function to calculate the total number of days from the Input date
to
the Date closed. 2- Also, How do I use DateIF to caculate the input date
and
today's actual date (real-time,until the date closed actually happens) to
still caculate the total dates open. For example G2 has an input date of
8/26/08 and P2 would have (todays actual date) and still caculate the
Total
dates open to automatically display in column W2. Thanks!
--
TBJohnson