A couple of ways

=SUM($A$5:INDEX(A:A,F1))


=SUM(A5:INDIRECT("A"&F1))

=SUM(OFFSET($A$5,,,F1-ROW($A$5)+1))

the first is to prefer since it is not volatile

F1 holds the X numbers

--
Regards,

Peo Sjoblom

(No private emails please)


"MJSlattery" <MJSlattery.1qe4ab_1118372701.8473@excelforum-nospam.com> wrote
in message news:MJSlattery.1qe4ab_1118372701.8473@excelforum-nospam.com...[color=blue]
>
> I want to be able to define the number of cells in a column that will be
> included in a calculation.
>
> =SUM(A5:A25)/2
>
> So in the above example I have selected 20 cell in column A. I want to
> be able to set the number via a slider on the spread sheet to capture
> any number of cell below the cell with the formula in it. So, and I
> know this does not work but, =SUM(A5:A(X))/2 where X equals the number
> of cells that I want included. I want to avoid VBA because this will
> update a graph and I don't want to run a macro every time the data gets
> changed to update my graph.
>
> I have gone through the Excel 2003 Bible, called MS Office support and
> combed the web. There must be a simple way to accomplish this without
> a macro.
>
> Thanks to all. Michael
>
>
>
>
>
>
> --
> MJSlattery
> ------------------------------------------------------------------------
> MJSlattery's Profile:
> http://www.excelforum.com/member.php...o&userid=16141
> View this thread: http://www.excelforum.com/showthread...hreadid=377967
>