You must be using 2003. AVERAGEIF() is available from 2007 version onwards.

Try the array formula. If a2:A10 = E2 then average C2:c10
=AVERAGE(IF((A2:A10=E2),C2:C10))

Please note that this is an array formula. You create array formulas in the
same way that you create other formulas, except you press CTRL+SHIFT+ENTER to
enter the formula. If successful in 'Formula Bar' you can notice the curly
braces at both ends like "{=<formula}"

If this post helps click Yes
---------------
Jacob Skaria


"lisab" wrote:

I'm trying to average the values in one column if another column's value is
true. I know there is a sumif and a countif, but couldn not find an
averageif. Any help would be much appreciated!