How to order pizza for a group
Count the crowd, then round up to whole pizzas.
1
Split adults and children
Children usually eat fewer slices, so keep the counts separate.
2
Choose the size
Confirm how many slices each pizza is cut into.
3
Round up
Order at least the calculated number and add one pie for a buffer.
What does this tool do?
Pizza ordering goes wrong when adults and children are counted the same way. This calculator uses three slices per adult and two per child, then rounds up to whole pizzas of the chosen size.
The Formula
Slices needed = adults × 3 + children × 2; pizzas = ceiling(slices ÷ slices per pizza)Frequently Asked Questions
How many slices per person should I plan?
Three slices per adult and two per child is a reliable baseline. Add a slice per adult for a hungry crowd or if there are no sides.
How many pizzas for 20 people?
With 15 adults and 5 children, plan for 55 slices, which is seven large pizzas at eight slices each. The calculator rounds up automatically.