Each row has to match to be counted, right?

=SUMPRODUCT(--(A1:A5=B1:B5))

Adjust the ranges to match--but you can't use whole columns (except in xl2007).

=sumproduct() likes to work with numbers. The -- stuff changes trues and falses
to 1's and 0's.

Bob Phillips explains =sumproduct() in much more detail he
http://www.xldynamic.com/source/xld.SUMPRODUCT.html

And J.E. McGimpsey has some notes at:
http://mcgimpsey.com/excel/formulae/doubleneg.html

Araseli wrote:

I'm trying to put together a formula that will count the number of times the
data in column a matches c.
I need a total column in this case(row 6) should say 2 because text in
columns a & c only match 3 times

Say i have:
a b c d e
1 c1 c1
2 c2 c1
3 f3 f3
4 p2 f3
5 t4 t4
6

--

Dave Peterson