Hi I'm looking for an easy chart that lists all cake pan sizes and how many boxes of cake mix for each size for round and square pans, all my pans are 3" deep thanks so much! [/b]

Problem with that is that not all cake mixes make the same amount of batter. It varies from brand to brand and flavor to flavor. Plus if you doctor them that changes things up a little bit.

The below chart tells you how many cups of batter per pan you need. I'd take your favorite cake mix and flavors and make a note of about how much batter they make and how much of each you need to use to fill your pans

http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-3-inch-pans.cfm