How Many Pizzas for a Party? A Per-Person Guide
Published by Avco Boxes, a custom pizza and bakery box manufacturer in Long Island, New York since 1989.
Plan on about 3 slices per adult and 2 per child. A large 14-inch pizza usually has 8 slices, so divide the total slices by 8 and round up. For 20 adults, that is 60 slices, or 7.5 pizzas, so order 8 large pizzas. Order a little less if you are serving plenty of other food, and a little more for teenagers or a dinner-time crowd.
How much pizza per person?
Appetites vary, but these per-person amounts work well as a starting point when pizza is the main food:
- Adults: about 3 slices of a 14-inch pizza.
- Children (roughly under 12): about 2 slices. Younger kids often eat 1.
- Teenagers and big eaters: plan on 3 to 4 slices.
- Light eaters or a snack-only event: 1 to 2 slices.
The formula is simple: people x slices per person / 8 slices per pizza = large pizzas needed. Always round up. A half pizza short is a bigger problem than a few leftover slices, and leftovers keep well if you refrigerate them promptly.
How many pizzas for 10 to 50 people
This chart assumes adults at 3 slices each and large 14-inch pizzas cut into 8 slices, with pizza as the main dish.
| Adults | Slices needed | Large pizzas (exact) | Large pizzas to order |
|---|---|---|---|
| 10 | 30 | 3.75 | 4 |
| 15 | 45 | 5.6 | 6 |
| 20 | 60 | 7.5 | 8 |
| 25 | 75 | 9.4 | 10 |
| 30 | 90 | 11.25 | 12 |
| 40 | 120 | 15 | 15 (16 for a little extra) |
| 50 | 150 | 18.75 | 19 |
How many pizzas for 20 people?
For 20 adults, order 8 large pizzas. That gives you 64 slices, enough for 3 slices each with 4 to spare. If the 20 people are a mix of adults and kids, work out each group separately:
- 12 adults x 3 slices = 36 slices
- 8 children x 2 slices = 16 slices
- Total: 52 slices / 8 = 6.5, so order 7 large pizzas
For a kids-only party of 20, at 2 slices each, you need 40 slices, which is exactly 5 large pizzas. Many hosts order a sixth for parents who stay.
When to order more or less
The 3-slice rule is a baseline. Adjust it for the event:
- Lots of other food: if you are serving salad, wings, sandwiches or a big dessert table, plan on about 2 slices per adult.
- Pizza is the whole meal: stick with 3, or go to 4 for a hungry group such as a sports team after a game.
- Time of day: a dinner-time party eats more than a lunch meeting or an afternoon event. A late-evening party after a full dinner may need only 1 to 2 slices each.
- Length of the event: people come back for seconds at long gatherings. For an event of four hours or more, add a pizza or two, or order in two waves so the second round arrives hot.
- Crowd: teenagers, college students and athletes reliably eat more than the baseline.
Using other pizza sizes
The chart uses 14-inch pizzas because that is the most common large. If you are ordering a different size, compare by area, not by slice count:
- 16-inch extra-large: about 201 square inches, roughly 1.3 times a 14-inch. If it is cut into 8, each slice is bigger, so count about 2 to 3 slices per adult.
- 18-inch New York pie: about 254 square inches, roughly 1.65 times a 14-inch. Most adults are full after 2 of those wide slices.
- 12-inch medium: about 113 square inches. If it has 8 slices, the slices are small, so plan on 3 to 4 per adult.
- Sheet pizza: a full sheet for an 18x26 box is a good value for big groups and is usually cut into small squares. Ask the shop how many pieces it cuts and plan on 3 to 4 squares per adult.
Our guide to how many slices are in a pizza lists slice counts and areas for every common size.
Choosing the mix of toppings
Most groups do best with a few simple choices rather than many specialty pies. A practical approach for a party order:
- Cheese: the safest choice for kids and picky eaters. Make it a good share of the order.
- Pepperoni: the most familiar meat topping for most groups.
- One vegetable pizza: covers vegetarians and anyone who wants something lighter.
- One or two specialty pies: for variety, if the group is big enough to finish them.
Ask guests about allergies and dietary needs ahead of time. Many pizzerias offer gluten-free crusts or dairy-free cheese, often in smaller sizes, so you may need to order those separately. For kids' parties, ask the shop for a square "party cut," which gives smaller pieces that are easier for little hands.
Party planning tips
- Order ahead. Call the pizzeria a day or more in advance for large orders, especially on weekends, and confirm the pickup or delivery time.
- Stagger delivery for long events. Two smaller drops beat one big one that sits out.
- Keep it warm. Leave pies in their closed boxes until serving, or hold them in an oven at 200°F for a short time. Food safety guidance for hot holding is 140°F or above.
- Watch the clock. Do not leave pizza out for more than 2 hours, or 1 hour above 90°F. Our post on how long pizza is good in the fridge covers storing leftovers.
- Have plates and napkins ready. Plan on two plates per guest for longer events. Sturdy kraft paper plates work well for dry and semi-dry foods like pizza.
- Plan for leftovers. Refrigerate them within 2 hours and see our guide on how to reheat pizza for the next day.
For pizza shops: catering and party orders
Party and catering orders can drain your box stock faster than a normal week, especially in your large sizes. If you take regular office lunches, team parties or event orders, build them into your weekly box count. Our guide on how many pizza boxes to order walks through the math, including reorder points.
For big orders, our large and party boxes include sizes up to 24x24 and an 18x26 sheet box, and our catering cases and trays cover the rest of the spread. Every custom pizza box order starts with a free digital proof, and production takes 7 to 10 business days after approval.