How does one get the most bang for their buck when ordering pizza, exactly? Twitter used @fermatslibrary literally did the math, and says one 18-inch pizza actually has more surface area than two 12-inch pizzas. In fact, you get 28 more square inches of pizza if you order an 18-inch pizza (254 square inches) compared to ordering two 12-inch pizzas (226 square inches.) But, if you're into crust you'll want to go for the