Having trouble figuring out how many pizzas to order? Use our pizza calculator to estimate the number of pizzas you’ll need to feed your friends. Our pizza calculator provides results based on how many people there are and how hungry—or hangry—they might be.

How to Use the Pizza Calculator

1. Enter the Number of Adults

• Find the input field labeled “Number of Adults.”
• Enter the total number of adults who will be eating the pizza.
• This number will be used to calculate the amount of pizza required for the adults.

2. Enter the Number of Children

• Find the input field labeled “Number of Children.”
• Enter the total number of children who will be eating pizza.
• Children typically consume less pizza than adults, and this is factored into the calculations.

3. Select Hunger Level

• Find the dropdown menu labeled “Hunger Level.”
• Choose one of the three options that best describes the appetite of the group:
  • Light: Suitable for groups with smaller appetites or when pizza is a side dish.
  • Average: Best for typical meals or standard pizza consumption.
  • Very Hungry: Choose this for groups with large appetites or when pizza is the main meal.

4. Select Crust Type

• Find the dropdown menu labeled “Crust Type.”
• Choose the type of pizza crust you plan to order:
  • Traditional: Standard crust thickness.
  • Thin Crust: Thinner than traditional, which may result in fewer slices filling the same appetite.
  • Stuffed Crust: Heavier and more filling due to the stuffed edges, which slightly adjusts the calculation.

5. Click the Calculate Button

• After entering all the required details, click on the button labeled “Calculate Pizzas.”
• The calculator will process the information and display the number of pizzas needed in various sizes.

6. Understand the Results

• The results section will provide a breakdown of how many pizzas are needed in different sizes:
  • Small Pizzas: Typically contain 6 slices per pizza.
  • Medium Pizzas: Typically contain 8 slices per pizza.
  • Large Pizzas: Typically contain 10 slices per pizza.
  • Extra-Large Pizzas: Typically contain 12 slices per pizza.

7. Adjust for Additional Factors

• If you plan to serve other foods alongside the pizza, consider adjusting the hunger level to “Light.”
• If ordering specialty crusts or customizations, confirm the slice count with the pizzeria, as it may vary slightly.
• Chicken wings is a popular choice alongside the pizza for an appetizer.

8. Place Your Order

• Use the results to place an accurate pizza order that minimizes waste and ensures everyone is satisfied.

Additional Notes:

• This pizza calculator is designed for general pizza orders and may not account for extreme variations in appetite or highly customized pizzas.
• For catering events or large parties, consider rounding up to the nearest pizza size to ensure there is enough for everyone.

Why Use a Pizza Calculator?

I’ve ordered lots of pizza in my time, and I’ve always wondered how much to order, especially when there are many hungry friends around. Calculating how many to order in your head can be complicated, so I created the pizza calculator to easily find out how much pizza to order.

If there are kids around, that means you will need less pizza. Most kids say they want the biggest pizzas, but in most cases, you will only need 2 slices per kid. For adults, they can eat much more. Adults eat around 3 to 5 slices of pizza depending on their hunger level and when they’ve eaten last.

This calculator can be used when you’re having a casual late-night hangout, at home watching a movie, or even at a birthday party. No need to guess and waste money by ordering too much—just use the pizza calculator to get an instant answer.

Understanding Pizza Sizes and Slices

Pizza size plays a large role in how much you’ll need, so let us break it down for you. Most pizza places follow a standard size chart for their pies, but there’s always room for a little variation. Here’s the typical slice count by pizza size:

• Small Pizza: 8-10 inches, usually 6 slices.
• Medium Pizza: 12-14 inches, with 8 slices.
• Large Pizza: 14-16 inches, also with 8 slices.
• Extra-large Pizza: 16-18 inches, often 8-10 slices.

Surprised? Contrary to popular belief, most pizzas—regardless of size—come with 8 slices. The exception is the small pizza, which typically has 6 slices due to its smaller diameter, and the extra-large pizza sometimes has 10 slices. Knowing these averages can help you when ordering from unfamiliar places or trying a new pizza restaurant in your local area.

Real-Life Examples of Pizza Sizes

Pizza sizes can vary wildly from one pizzeria to the next. Here are a few examples to give you a better sense of the range:

• Joe’s Pizza in New York City serves a large plain cheese pizza at a whopping 21 inches, cut into 8 slices.
• Metro Pizza in Las Vegas offers an 18-inch large pizza, which can be cut into 6 or 8 slices depending on the location.
• On Scott’s Pizza Tours in NYC, the standard pie size is 18 to 20 inches, and it’s almost always sliced into 8 pieces.

As you can see, what’s considered “large” can change depending on the place. When you’re not sure, call the restaurant and confirm the size and slice count before placing your order. They will have a better idea of how many slices you might need.

Interesting Pizza Facts

Where was Pizza invented
Pizza was basically invented in Italy, with the modern pizza we know today first appearing in Naples in the late 18th century. At the start, it was a simple dish made with dough, tomatoes, cheese, and olive oil, created to be affordable for working-class people.

World’s Largest Pizza
The world’s largest pizza was created in Rome, Italy, in December 2012. It measured 13,580.28 square feet and was named “Ottavia” in honor of the first Roman emperor, Octavian Augustus. The pizza was gluten-free and consisted of over 17,000 pounds of dough. Talk about feeding a large crowd!

Most Popular Toppings
Worldwide, pepperoni is the most popular pizza topping. In the United States alone, pepperoni is used on over 36% of all pizzas ordered. Other popular toppings include mushrooms, onions, sausage, and green peppers.

Margherita Pizza Colors
The Margherita pizza, named after Queen Margherita of Savoy, was created in 1889. Its ingredients—basil, mozzarella, and tomato—represent the colors of the Italian flag (green, white, and red).

Consumption Statistics
Americans eat around 3 billion pizzas each year, which averages about 46 slices per person annually. Something like 93% of Americans eat pizza at least once a month, making it one of the most widely consumed foods in the country.

Most Expensive Pizza
The most expensive pizza in the world is the Louis XIII pizza, created by chef Renato Viola in Italy. It costs around $12,000 and includes luxury ingredients like caviar, lobster, and edible gold flakes. For most of us, this is a once-in-a-lifetime meal.

Pizza Delivery Milestone
The first pizza delivery took place in 1889 when Raffaele Esposito, considered the inventor of modern pizza, delivered a Margherita pizza to Queen Margherita of Savoy.

Square-Cut Pizza Tradition
In some regions, like Chicago and Northeastern Pennsylvania, square-cut pizza is a popular style. This is also known as “party cut” or “tavern cut” and is designed to provide smaller, shareable pieces.

Pizza Day Celebrations
National Pizza Day is celebrated every year on February 9th in the United States. It’s a day dedicated to enjoying and appreciating pizza in all its forms.

Frozen Pizza Industry
The frozen pizza industry started in the 1950s and has since become a multi-billion-dollar business. The first commercially successful frozen pizza was sold by Totino’s in the 1960s.

These facts show the rich history of pizza, its global appeal, and its versatility, making it one of the world’s most beloved foods.

Final Thoughts About the Pizza Calculator

We created this calculator primarily to help you save money. Knowing how much pizza to buy can be a challenge and often leads to waste. While leftover pizza can be great for the next day—especially if you’re feeling hungover—it’s always better to order just the right amount.

Using our pizza calculator can help you make quick decisions when your guests are hungry, whether you’re hosting a party, hanging out in an Airbnb, or simply relaxing with your family. Use the calculator to save both time and money, and don’t forget to order wings with your pizza—they make for a fantastic appetizer!