According to: http://www.quiltersbuzz.com/2006/05/post_25.html

From one fat quarter of fabric, which measures approximately (18” x 22”) and probably costs about $2.50, you can cut the following:

99…..2” squares

56…..2 ½” squares

42…..3” squares

30…..3 ½” squares

20…..4” squares

16…..4 ½” squares

12…..5”squares

9…..6” squares

6…..6 ½” squares

Ok, I did not believe that you could get 99….2” squares out of a fat quarter…but I did my math (and I did not even have to use the “FabricCalc” to help me with my calculations) and it is true!

I had to take it one step further…and you can also get:

4.….7” squares…maybe 6 if you cut perfect and did not lose much fabric on the squaring up!

4..…8” squares

and maybe even 4…..9” squares, (with perfect cutting) but, for sure you can get two.

Anyway, I hope the above information will help you in planning and designing your quilts and will help you to really get all you can get out of a fat quarter!