9 Inch Round Cake Pan Volume. 13″ x 9″ x 2″ 14 cups: For example, a 6 in.
9″ x 9″ x 1.5″ 8 cups: Beware that changing the pans might change the baking time. This chart helps down and upscale cake recipe quantities and assumes that the recipe you are using is the most common size/shape, which is an 8 inch (20cm) round cake and 3 inch (7.5cm) deep.
For square cakes, use the round quantities below and deduct 1 inch from the round cake chart, or alternatively, see the cake tin sizes chart above.
General formula for any sized tier: Cakes that measure 3 to 6 inches high, baked in the same size pan, would yield the same number of servings because they follow the same pattern of cutting. So the area of that 9” round pan? 9″ x 9″ x 1.5″ 8 cups: