Pizza Split Calculator 🍕

Enter the number of people, their general appetite level, and the number of slices per pizza, and the calculator tells you exactly how many pizzas to order. It uses a ceiling function — always rounding up — because running out of pizza is the one outcome this calculator is designed to prevent. Appetite level adjusts the assumed slices per person, from light eaters to those who will absolutely eat six slices and look you in the eye while doing it.

Pizzas needed = ceil((people × slices_per_person) / slices_per_pizza). Appetite level adjusts slices_per_person.

Use this before ordering for any group — parties, office lunches, family gatherings, watching the game. The most common pizza ordering mistake is underestimating: people order based on what sounds like enough and then someone's going home hungry. Run the numbers first, then add one if it's a late night or there are teenagers involved.