How many wedding cake servings can you get from a 12x10 that is 3 inches deep?

A 12x10-inch cake that is 3 inches deep can yield approximately 30 to 40 servings, depending on how the cake is cut. For standard wedding cake servings, which are typically around 1x2 inches, you can expect to get about 36 servings if cut properly. The depth of the cake allows for a good number of servings while maintaining a nice presentation.