How Big is a 20 Inch Pizza?

When hunger strikes and only pizza will do, understanding the size of the pizza you’re ordering is key. A 20-inch pizza is often mentioned, but how big is it really? Let’s slice into the details!

Dimensions Of A 20 Inch Pizza

The size of a pizza is typically measured by its diameter. Therefore, a 20-inch pizza has a diameter of 20 inches from edge to edge. To better visualize this, a standard ruler is usually 12 inches long, which means a 20-inch pizza is almost twice as long as a ruler!

Area Calculation: To understand how much pizza you’re getting with a 20-inch pie, it’s helpful to calculate the area. The area (A) of a circle is πr², where π (pi) is approximately 3.14 and r is the radius (half the diameter).

A = πr² = π (20/2)² = π 10² = π 100 ≈ 314 square inches.

Comparing Pizza Sizes

Diameter (inches)Area (square inches)
10≈ 78.5
12≈ 113.1
14≈ 153.9
16≈ 201.1
18≈ 254.5
20≈ 314.2

As the table above shows, a 20-inch pizza significantly outpaces smaller sizes in terms of total area covered. This means there’s a whole lot more deliciousness to go around!

Serving Size And Yield

Regarding serving sizes, a typical slice of pizza from a 14-inch pie might be 1/8th of the pizza. However, due to the larger size of a 20-inch pizza, you might find it cut into anywhere from 10 to 16 slices. Here’s a rough guide on how many people you can serve with a 20-inch pizza, assuming an average appetite:

  • If cut into 10 slices: Serves 5-7 people
  • If cut into 12 slices: Serves 6-8 people
  • If cut into 16 slices: Serves 8-10 people

Note: The number of slices can vary based on the pizzeria and customer preference, so it’s always best to ask how many slices the pizza will be cut into beforehand.

Great For Groups

A 20-inch pizza is a popular choice for group gatherings, parties, or family dinners because it offers several slices and can be cost-effective. When ordering for groups, it’s always a good idea to consider the various appetite levels, ages, and the presence of other food when deciding whether a 20-inch pizza will suffice.

Frequently Asked Questions On How Big Is A 20 Inch Pizza

How Many Slices In A 20-Inch Pizza?

Typically, a 20-inch pizza is cut into 12 to 16 slices.

Can A 20-Inch Pizza Feed A Family?

Yes, depending on appetite, a 20-inch pizza can generally feed 4-6 people.

What’s The Area Of A 20-Inch Pizza?

A 20-inch pizza has an area of approximately 314 square inches.

20-Inch Pizza Vs Two 10-Inch Pizzas?

A 20-inch pizza is four times larger in area than a single 10-inch pizza.


In summary, a 20-inch pizza is quite a sizable meal option and is best suited for larger groups or parties. Its massive surface area offers plenty of food to satisfy your guests, making it a convenient choice for any host.

So, next time you’re contemplating the size of your pizza order, remember that a 20-inch pizza might just be the perfect fit for your gathering!

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