How many cake mixes for a rectangular pan 16x24x2 in deep?

To fill a rectangular pan measuring 16x24x2 inches, you will need about 2 to 3 standard cake mixes, depending on the specific recipe and the desired cake height. A typical cake mix yields about 4 to 5 cups of batter, and for a pan of this size, you will need approximately 10 to 12 cups of batter to fill it adequately. Always check the mix instructions, as some brands may vary slightly in volume.