If you go to www.wilton.com
and click on Cake on the left side of the page, then click on Cake Preparation at the top... On the next page, scroll down to Baking times, batter amounts and # of servings at the bottom of the page and click on that. At the bottom of the next page, you will find links for Wedding & Party cake baking and Cutting guides for 2 and 3 in. pans.
I use this all the time. Hope it helps!