It depends on how deep the cake pan is.
1/2 full
If you are using a 2" deep cake pan you would need 13.5 cups of batter.
28.5
The capacity of cake pans can vary based on their size and depth. Generally, a standard 9-inch round cake pan holds about 6 cups of batter, while a 6-inch round pan holds around 3 cups. For Wilton heart-shaped cake pans, the smaller 6-inch pan typically holds about 3 cups of batter, while the larger 9-inch heart pan can hold around 6 to 7 cups, depending on the specific model and depth. Always check the packaging or manufacturer's guidelines for precise measurements.
1/2 way filled
The weight of a 14x14 inch sponge cake can vary depending on the recipe and ingredients used, but a typical sponge cake weighs around 2 to 4 pounds when baked. The density and moisture content of the cake will influence the final weight. For a more accurate estimate, consider the specific ingredients and proportions in your recipe.
Just fill each pan a little over halfway full so it will have plenty of room to rise
For a typical 2-layer cake (using either 8" or 9" cake pans) you need about 2 1/2 cups of frosting. This will fill the cake and cover the top and sides.
They'll cover 105.5 square feet, with a little (2-inch by 4-inch) spot left uncovered.
For an 8-inch square cake pan, you typically need about 4 to 5 cups of cake batter, depending on the recipe. This amount allows for a proper rise and ensures the cake bakes evenly without overflowing. It's always a good idea to check the specific recipe you're using, as some may have variations in the required batter volume.
A square foot will cover a square foot, regardless of the depth of the material the cover is made of.