Try this formula...

=SUMPRODUCT((A1:A100="B")*(B1:B100="BIG"))

The top end of the ranges (A100, B100) can be made to cover any span you may
have now or in the future.

Rick


"Evan" wrote in message
...
Can anyone help on how to properly write a function to count the number of
cells in a column with a certain value if they have a corresponding value
in
a different column? For example, I want to count how many times "BIG"
appears in Column B, if the same row has "B" in Column A.
A B
1 B BIG
2 C BIG
3 C SMALL
4 D SMALL
5 B SMALL
6 F MEDIUM
7 F BIG
8 E SMALL
9 E MEDIUM
10 D BIG
11 C BIG
12 B SMALL
13 C MEDIUM
14 E SMALL
15 A SMALL
16 F MEDIUM
17 D SMALL
18 A BIG
19 B SMALL
20 C BIG

Thanks!
Evan