The easiest way would be to link to each of those cells like this:

=Jan!CT19
=Feb!CT19
=Mar!CT19
......
=Dec!CT19

Then just average that range.

Array entered:

=AVERAGE(IF(A1:A12,A1:A12))


--
Biff
Microsoft Excel MVP


"Ellen G" wrote in message
...
Hi there --

I have a workbook with a tab for each month (i.e. Jan, Feb, Mar...Dec).

I need to AVERAGE CT19 in each. And, I don't want to include any that are
0.
So, I've tried the following, but it doesn't work. (I have tried this both
as
an array and not an array.)

=AVERAGE(IF(Jan:Dec!$CT19<0,Jan:Dec!$CT19)

Any suggestions?

Thanks so much.

Ellen