A 16-inch (40cm) pizza is actually four times as big as an 8-inch (20cm) pizza. Or as any math geek out there likes to say it: a pizza is a circle, and the area of a circle increases with the square of the radius. I did not know that and I always thought that the medium pizza is the best option out there. But oh boy, I was wrong.
This little app helps you choose the best pizza for the money. You simply add two or more pizzas that you want to compare and it will tell you which one to choose.