18 inch pizza
An 18-inch pizza is an extra large pie: about 254 square inches, usually 8 slices, enough for 4 to 7 people.
The numbers
- Diameter
- 18 in 45.7 cm
- Area
- 254 sq in
- Around the crust
- 56.5 in
- Usual slices
- 8
- Each slice
- 31.8 sq in
- Feeds
- 4 to 7 people
See an 18 inch pizza at real size
This is how much space an 18-inch pizza takes up. On a phone, scroll around the box to see the whole pie.
for scale
How many slices in an 18 inch pizza?
Most pizzerias cut an 18-inch pizza into 8 slices. Some shops cut this size into 10 or 12 thinner slices, and square-cut pies have more, smaller pieces. Cut into 8, each slice is about 31.8 square inches with 7.1 inches of crust along its outer edge.
How many people does it feed?
Plan on an 18-inch pizza feeding 4 to 7 people. An adult with an average appetite eats about 58 square inches of pizza, which is three slices of a large. Light eaters and kids eat about two thirds of that.
How it compares to other sizes
Pizza gets bigger faster than the inches suggest, because area grows with the square of the diameter. An 18-inch pizza has 12% more pizza than a 17-inch. Step up to a 20-inch and you get 23% more again.
Two 17-inch pizzas give you 454 square inches against 254 for one 18-inch. The pair is 78% more pizza, so the question is whether it costs less than that much extra. Put your shop's prices into the size comparison tool to see which is the better deal.
18 inch pizzas for a party
These are for adults with average appetites. For a mix of adults and kids, or a party with other food, use the party calculator.
How much dough for an 18 inch pizza?
Making one at home? A New York style 18-inch pizza needs a dough ball of about 650 g (22.9 oz). The pizza dough calculator gives the full recipe for any style.
Questions about 18 inch pizza
How big is an 18 inch pizza?
An 18-inch pizza measures 18 inches (45.7 cm) from edge to edge through the middle. Its area is about 254 square inches and it is 56.5 inches around the crust.
How many slices in an 18 inch pizza?
Most shops cut an 18-inch pizza into 8 slices. Some shops cut this size into 10 or 12 thinner slices, and square-cut pies have more, smaller pieces.
How many people does an 18 inch pizza feed?
An 18-inch pizza feeds 4 to 7 people. The lower number is for adults with average appetites and the higher number is for light eaters or kids.
What size is an 18 inch pizza?
Most US pizzerias would call an 18-inch pizza an extra large. Names are not standard, so one shop's medium can be another's large. Always check the inches on the menu.
Is an 18 inch pizza much bigger than a 17 inch?
Yes. An 18-inch pizza has 12% more pizza than a 17-inch one, even though it is only 1 inch wider. Area grows with the square of the diameter.
How much dough for an 18 inch pizza?
About 650 g (22.9 oz) of dough for a New York style 18-inch pizza. Thin crust needs about a quarter less and pan pizza about a third more.