PartyPrepList

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.

Pizza slices on a party table

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.

How many pizzas for 25 people? Plan about 10 large pizzas at 3 slices per adult. How many pizzas for 30 people? Plan about 12 large pizzas, or 9 to 10 if you serve filling sides.

How to calculate pizza for any group

The formula is simple: (guests × slices per person) ÷ slices per large pizza. Most adults eat 3 slices, kids eat 2, and a large pizza has 8 slices. So for 20 adults: 20 × 3 = 60 slices, divided by 8 = 7.5, round up to 8 large pizzas. For 50 adults: 50 × 3 = 150 slices ÷ 8 = 18.75, round up to 19 large pizzas. If half the guests are children, order about 15% to 25% less. The calculator above does this automatically for any guest mix, including teens, kids and vegetarian guests.

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

Shopping List

Estimated quantities - adjust serving tiers or edit package sizes if your local products differ.

ItemCost

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.

PeopleLarge pizzasPeopleLarge pizzas
1043012
1563514
2084015
25105019
752910038

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 sizeTypical diameterTypical slicesUsually feeds
Small10–12 inches6 slices1–2 adults
Medium12–14 inches8 slices2–3 adults
Large14–16 inches8 slices2–3 adults
Extra large16–18 inches10–12 slices3–4 adults

How many slices in a large pizza?

A standard large pizza is usually cut into 8 slices and feeds about 2 to 3 adults. Medium pizzas are typically 8 slices too, while small pizzas are 6 slices. Some chains cut large pizzas into 10 or 12 slices, so confirm the slice count before ordering for a crowd.

Pizza sizeTypical diameterSlicesFeeds
Small10–12 in61–2 adults
Medium12–14 in82–3 adults
Large14–16 in82–3 adults
Extra large16–18 in10–123–4 adults

How many pizzas for 50, 60 or 100 people?

At 3 slices per adult and 8 slices per large pizza: 50 adults = 19 pizzas, 60 adults = 23 pizzas, 100 adults = 38 pizzas. With many children or filling sides, cut those totals by 15% to 25%.

  • How many pizzas for 50 people? Plan about 19 large pizzas at 3 slices per adult.
  • How many pizzas for 60 people? Plan about 23 large pizzas for adults eating 3 slices each.
  • How many pizzas for 100 people? Plan about 38 large pizzas, or 28 to 32 when many guests are children or you serve sides.

For drinks and supplies alongside your order, use the party drink calculator.

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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 25 people?

For 25 adults as a full meal, plan about 10 large pizzas at 3 slices per adult. For a mixed group of adults and kids with side dishes, 8 to 9 large pizzas is usually enough.

How many pizzas for 30 people?

For 30 adults at a meal, plan about 11 to 12 large pizzas, since 30 adults at 3 slices each need 90 slices and a large pizza has 8. With filling sides, 9 to 10 is usually enough.

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.

How many pizzas for 30 people?

For 30 adults at a meal, plan about 11 to 12 large pizzas, since 30 adults at 3 slices each need 90 slices and a large pizza has 8. With filling sides, 9 to 10 is usually enough.

How many slices of pizza per person for a kids party?

Kids 13 and under eat about 2 slices each at a party. For 20 children, plan about 5 large pizzas, and fewer if you are also serving chips, fruit or other sides.

How many slices in a 16 inch pizza?

A 16-inch pizza is usually cut into 8 slices, though some pizzerias cut 10 or 12 for smaller pieces. It feeds about 3 to 4 adults, or about 5 children.

How many slices in an 8 inch pizza?

An 8-inch pizza is a personal size, typically cut into 4 to 6 slices. It feeds about one adult, or one adult plus a small child.