Free calculator
Pizza Calculator
How many pizzas to order for a group, by size and appetite — and how much dough to make if you are baking them yourself.
Your results
Pizzas to order
10
Total slices
80
Slices per person
3.0
Dough, if you are baking
3.5 kg (7.7 lb)
Three slices per adult is the working number, whatever size the pizza is. Order by slices and divide, rather than guessing at pies — a large and a medium are not the same fraction of a person, and that is where orders go wrong.
Round up, always. A leftover pizza is breakfast; a missing pizza is a phone call, a second delivery fee and forty minutes of people watching the door. The asymmetry is not close.
If you are making them, a 12-inch base wants about 350 g of dough. Doubling the diameter of a pizza quadruples its area, so a 16-inch pie needs nearly twice the dough of a 12-inch one, not a third more.
Questions people ask
How many pizzas for 25 people?
Ten medium 12-inch pizzas, or eight large. That is 75 slices for 25 adults at three each — order the tenth even if the maths says nine and a half.
How many slices does a large pizza have?
A 14-inch large is usually cut into ten, a 12-inch medium into eight, and a 16-inch into twelve. Pizzerias vary, so it is worth asking when you order for a crowd.
How many pizzas for kids?
Two slices each under twelve, and one or two for the very small. Children eat less pizza than the adults ordering it expect, which is why parties end with cold cheese pizza.