Pizza Calculator
Ordering too much pizza wastes money - ordering too little is worse. Enter adults and kids to calculate how many pizzas you need for 10, 15, 20, 35, 40, 50, 75 or 100 people, plus drinks and supplies.
Quick answer: how many pizzas per person
Most adults eat about 3 slices, kids eat about 2 slices, and a large pizza usually has 8 slices. For 75 adults, start around 28 large pizzas, then adjust for kids, sides, and appetite. This pizza party calculator also adds chips, drinks, cookies and supplies so your entire shopping list is in one place.
Pizza quantity chart
Use this chart as a fast starting point for adults eating about three slices each from an eight-slice large pizza. If half the guests are children or you serve filling sides, order about 15% to 25% less.
| People | Large pizzas | People | Large pizzas |
|---|---|---|---|
| 15 | 6 | 20 | 8 |
| 35 | 14 | 40 | 15 |
| 50 | 19 | 75 | 29 |
How many slices are in a pizza?
A standard large pizza is usually cut into 8 slices, but size and cut style vary by restaurant. Use the actual slice count from your pizza shop in your final order.
| Pizza size | Typical diameter | Typical slices | Usually feeds |
|---|---|---|---|
| Small | 10–12 inches | 6 slices | 1–2 adults |
| Medium | 12–14 inches | 8 slices | 2–3 adults |
| Large | 14–16 inches | 8 slices | 2–3 adults |
| Extra large | 16–18 inches | 10–12 slices | 3–4 adults |
How many slices are in a large pizza? Eight is the most common answer. Some restaurants cut a large pizza into 10 or 12 slices, so confirm the shop’s size and slice count before ordering for a crowd.
Start with the basics
Summary
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Estimated quantities - adjust serving tiers or edit package sizes if your local products differ.
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Pizza Calculator questions
How many slices are in a large pizza?
A large pizza usually has 8 slices and feeds about 2 to 3 adults. Some restaurants cut large pizzas into 10 or 12 slices, so confirm the slice count before placing a large order.
How many pizzas for 15 people?
For 15 adults eating about 3 slices each, order 6 large pizzas with 8 slices each. If several guests are children or you are serving filling sides, 4 to 5 large pizzas may be enough.
How many pizzas do I need for 20 people?
For 20 adults as a full meal, plan 7 to 8 large pizzas at 3 slices per adult. For 20 kids, plan about 5 large pizzas at 2 slices per child. If you also serve salad, chips or dessert, you can reduce the order by 1 to 2 pizzas.
How many pizzas for 35 people?
For 35 adults, plan about 14 large pizzas when each person eats 3 slices and each pizza has 8 slices. For a mixed group of adults and kids with side dishes, 11 to 13 pizzas is usually enough.
How many pizzas for 40 people?
For 40 adults as a full meal, plan 15 large pizzas at 3 slices per adult. With children or filling sides, 12 to 13 large pizzas may be enough.
How many pizzas for 75 people?
For 75 adults, plan about 29 large pizzas at 3 slices per person and 8 slices per pizza. For a mixed group of adults and kids with sides and dessert, 22 to 26 pizzas is a practical range.
How much pizza for 100 people?
For 100 adults, plan about 38 large pizzas if each person eats 3 slices and each pizza has 8 slices. For a mixed group with children, 28 to 32 large pizzas is usually enough when you also serve sides and dessert.
How many slices of pizza per person?
Plan 3 slices per adult, 2 slices per child under 13, and 2.5 to 3 slices per teen. A standard large pizza has 8 slices.
How many people does one large party pizza feed?
A large pizza with 8 slices feeds about 2 to 3 adults or 3 to 4 children. For a mixed group, one large pizza typically feeds about 3 people.
How many pizzas for 10 adults and 10 kids?
Ten adults at 3 slices each and 10 kids at 2 slices each need about 50 slices, or 6 to 7 large pizzas. Enter both guest counts above to adjust for sides and appetite.
What sides go with pizza for a party?
Popular pizza party sides include chips, green salad, fruit platter and breadsticks. The calculator lets you add or remove sides and adjusts the pizza count automatically.
What drinks and dessert should I plan for a pizza party?
Plan soda, water and juice for kids, plus beer or wine if adults are drinking. Cake, cupcakes, cookies or ice cream all work for dessert.