layer cake formula: area x 0.45 = approximate weight of batter (in ounces)
- 6-inch round: about 12 ounces batter.
- 8-inch round: about 24 ounces batter.
- 8-inch square: about 28 ounces batter.
- 9-inch round: about 28 ounces batter.
- 10-inch round: about 35 ounces of batter.
- 2-inch cupcake: about 1 3/4 ounces batter.