About the Pizza Party Calculator
How many pizzas to order for a group, by appetite and pizza size.
Also known as: how many pizzas for a party, pizza for guests, pizza order calculator, pizza per person.
How to use this calculator
- Enter adults, children, appetite, pizza size and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
pizzas = total slices needed ÷ slices per pizza, rounded up
Worked example
Using the values pre-filled in the calculator above:
- Adults = 12
- Children = 4
- Appetite: Average (3 slices)
- Pizza size: Large (8 slices)
- Price per pizza = 14
the calculator returns:
- Pizzas to order: 6
- Total slices needed: 44
- Slices you will have: 48
- Spare slices: 4