Make sure you have the Analysis toolpak installed (tools-add-ins and check
analysis toolpak)

The formula you want is

=EOMONTH(A1,0)-A1+1

"Narnimar" wrote:

I need a formula to return no of days to that month for a given date in the
cell. If I enter 15-Jan 2009 in cell A1 the formula should return the no of
days remaining in that month in A2.
Appriiate anyone help me in this.