How Many Slices In 18 Inch Pizza


by Elena Mill


An 18-inch pizza comes in 12-14 slices. It is considered an extra large pizza. The standard cut of pizza offers 14 slices. The shape of the pizza comes in a square shape. You will have to square it or multiply it by a pi square. 

You will never find any shortage of cheese on those jumbo-sized slices of Costco pizza. There are exactly 12 slices in a 18-inch round Costco pizza.

And there is a classic way of cooking the size of a circle. It is divided by the diameter of 2 to work out the radius. 

And, if you want to know an 18 inch pizza feeds how many people the answer is 7-8 people at a time. It is the perfect size for a pizza party.

And if you invite kids to the pizza party, it is enough for 11-13 kids provided that they love eating pizzas. 

The area of the pizza is 254 sq inches and if pizza is your favorite food, then a 18 pizza is one your best bet for you and your friends.

Extra large pizzas come in between 16 to 18 slices in diameter and it is enough for kids who love to eat  pizzas with 12 slices. 

Medium pizzas run 12 inches in diameter. Extra large pizzas are highly in demand and are loved by many pizza lovers at a time.

The pizza sizes of 12 inches and 18 inches happens to be one of the best that is affordable and is cheaper than buying a small pizza. 

The large pizza should always be chosen because it will cost less per square inch. Even though a 18-inch pizza is four times as big as an 10-inch pizza, the larger pizza will cost much less overall. 

But how many slices in pizza are available? 

The 18 inch pizza is about the size of a tire of a car. And, that is so pretty big. The diameter in centimeters can measure about 45 cm. It means that it can easily feed a group of people who are known for their hungry cravings. 

Given that the size of the pizzas are circular, the area of the 18-inch pizza area is almost 2.25 times greater than the 12-inch pizza or (9/6)2.

Due to the fact that both pizzas are divided into 8 pieces, a slice from the 18-inch pizza is 2.25 times larger than a slice from the 12-inch pizza.

How Many People Will Easily Feed On A 18-Inch Pizza?

How Many Slices In 18 Inch Pizza

An 18-inch pizza can feed at least 7-8 people at a time. So, you will need to cut it into 1 sq inch servings and be able to serve at one go.

If there are more than 12 people, it is best to order one 18 inch pizza and a medium size pizza of 12 inch to serve the crowd. 

You will have to think of pizza sizes by inches as they may solve the craving for 6 to 8 pizza lovers.

All pizza lovers love to eat cheese pizzas. And if they add some more toppings with the cheese, 

How Big Is 18 Inch Pizza

An 18 inch pizza is 254 sq inches and it is good to fit in a group of people with 10-12 in numbers. 

  • This pizza is measured in diameters and 18 inch pizza is considered to be an xxl size pizza
  • If it is a standard pizza, it counts 16 inches 
  • A 18 inch pizza is a big crust that boasts a full of a better deal with 226 sq diameter and also 254 sq inches  

Guide On : Can Dogs Eat Pizza- All You Need To Know 

How Many 18 inch Pizzas Do I Need For 15 People?

If one 18-inch pizza is a perfect fit for 6 to 8 pizza lovers and in this regard, ordering for 2 18 inch pizzas is perfect for 15 people in a crowd.

This is  a good choice for people who are pizza lovers and die heart fans of different pizza toppings. Everyone is satisfied with eating an 18 inch pizza especially when they are in a crowd. 

Checklist on the number of slices & number of people-

  • 15 People = 6 Pizzas
  • 20 People = 8 Pizzas 
  • 30 People = 12 Pizzas 
  • 50 People = 19 Pizzas

How Many Calories Is In A 18 Inch Pizza?

How Many Slices In 18 Inch Pizza

One slice of pizza with 18 inch pizza is just too good for thin people and for fat people it is best to keep a check on the toppings and the quantity of cheese on it.

It contains almost 500 calories and then the large pizza may contain almost 6000 calories. It is the size of the pizza that makes it call an extremely extra large size of pizza. 

Tips For Ordering 18 Inch Pizza 

  • Know about the head counts before ordering for 18 inch pizza 
  • Know how many pieces each head can eat
  • Talk to the experts at the counter about the diameter of the pizza 
  • Make use of a pizza calculator for better and faster ordering (even for large and mid-sized groups)
  • Know about the choice of toppings that people like to eat, order according to that for avoiding wastage of food 

frequently asked questions

Q1. How many slices are in an 18 inch Domino’s pizza?
Ans1. There are 9-10 inches of pizza slices available for 18 inch domino’s pizza. If it is cut smaller in size, pizza lovers can get it cut down to 12 slices. 

Q2. Is an 18 inch pizza enough for 4?
Ans2. Yes, an 18 inch pizza is more than enough for 4 people. A personal pizza the cost of the pizza is also affordable and within the best budget. 

Q3. What is a regular size pizza?
Ans3. A regular size pizza ranges between 12 to 14 inches. And, it is perfect to serve 3 to 4 people at a time. 

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Elena Mill

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