How much batter for a 16x16x2 pan?

For a 16x16x2-inch pan, you'll need approximately 8 to 9 cups of batter, depending on the recipe and desired thickness. This is based on the general guideline that a standard cake batter yields about 1.5 to 2 cups per 9-inch round pan. Adjustments may be necessary based on specific ingredients or desired cake density. Always fill the pan to about 2/3 full to allow for rising.