Food & Cooking
Pizza Planner
Calculate how many pizzas to order for a group of any size.
Over-ordering pizza wastes money; under-ordering leaves people hungry. This calculator accounts for appetite levels and group size to give you an exact order.
Order Size
3 Pizzas
- total Slices
- 24 slices needed
- per Pizza
- 8 slices each
- extra Slices
- 0 leftover slices
Formula and method
Pizzas = ⌈(Adults × Slices + Kids × 2) / Slices per Pizza⌉
Conservative slice estimates by appetite. Adults: 2-4 slices, kids: ~2 slices. Rounds up to whole pizzas.
Worked examples
Birthday party, kids and adults
- Adults:
- 5
- Kids (under 12):
- 8
- Adult Appetite:
- Normal (3 slices)
- Slices per Pizza:
- 8
Order Size: 4 Pizzas
Office lunch
- Adults:
- 10
- Kids (under 12):
- 0
- Adult Appetite:
- Hungry (4 slices)
- Slices per Pizza:
- 8
Order Size: 5 Pizzas
Assumptions and limits
- Standard 8-slice large pizza
- Kids average 2 slices
This tool provides an educational estimate. Rules, rates and personal circumstances can change the answer. Review the assumptions before relying on a result. Report a correction.
Common mistakes to avoid
- Not accounting for dietary restrictions — always have a veggie option.
- Ordering all the same type when groups have diverse preferences.
Frequently asked questions
Should I order different sizes?
Large pizzas almost always offer better value per slice than medium. Calculate cost per slice: divide price by number of slices. Larges typically save 15-20% vs mediums per slice.