Work out pizza slices per person instantly with clear inputs, formula shown and shareable results.
Slices needed are people times slices each, and pizzas are that figure divided by slices per pizza and rounded up, with the excess reported as leftovers. Rounding up is unavoidable since you cannot order two thirds of a pizza, so seeing the leftover count helps decide between sizes.
Slices needed
slices = people x slices per person
Pizzas
pizzas = ceiling(slices needed / slices per pizza)
slices = people x slices per person. Slices needed are people times slices each, and pizzas are that figure divided by slices per pizza and rounded up, with the excess reported as leftovers.
Rounding up is unavoidable since you cannot order two thirds of a pizza, so seeing the leftover count helps decide between sizes.
Enter number of people, slices per person, slices per pizza. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.