How many pizzas for 30 people?

Short answer

For 30 people at 3 slices each, order 12 pizzas of 14 inches — 96 slices, covering the 90 slices with a few to spare.

How to work it out

  1. 30 adults × 3 large slices = 90 slices of a 14 in pizza (19.2 sq in each)
  2. = 1,732 sq in ÷ 154 sq in per 14 in pizza = 12 pizzas (96 slices)

Thirty people is a classroom, a youth team or a big birthday. At that size the order gets big enough that it is worth calling ahead, splitting the delivery, and thinking about extra-large pizzas.

Adjust for your project

Everyone eating, including the hosts
Counted in slices of a 14 in large cut in 8. 2 with other food, 3 for a pizza dinner, 4 for teenagers
A planning adjustment on top of the standard portion, not a published figure
More options: Kids · Cut · Extra
Counted as half an adult portion — adjust if your kids are teenagers
Most chains cut 12–16 in pizzas into 8; New York style is often 6. Ask the shop
%
The pizza count is already rounded up to whole pizzas
Pizzas to order12 pizzas14 in large
Slices (at this size and cut)
96 slices
Same amount in 14 in large pizzas
11.3
Adults fed per pizza
2.7
Area of one pizza
154 sq in (993 cm²)
  • For ten or more pizzas, call the shop a day ahead and ask for staggered delivery so the second half arrives hot.

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Heavy-duty paper plates (bulk)Pizza goes on small plates — and you will want two per guest, since the first one gets greasy.
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Pizzas for your guests by size (slices each as above)

Pizzas for your guests by size (slices each as above)
Pizza sizePizzas to orderSlices (at this size and cut)Adults fed per pizza
10 in small23 pizzas184 slices1.4
12 in medium16 pizzas128 slices2
14 in large12 pizzas96 slices2.7
16 in XL9 pizzas72 slices3.5
18 in7 pizzas56 slices4.4

Twelve large, or nine extra large

At three large slices each, thirty adults eat about 90 slices — roughly 1,730 square inches. Twelve 14 in pizzas give 1,847 square inches; nine 16 in pizzas give 1,810. Either works. Twelve boxes take up a whole table, so for a buffet the extra-large route saves space, and it is often cheaper per square inch. Medium pizzas are the expensive way to feed thirty — you would need sixteen.

A plan for thirty

  • Order the day before and ask for two deliveries 20 minutes apart, so the second half arrives hot while the first is being eaten.
  • Cut squares for kids. A large “party cut” into small squares stretches further with young children.
  • Drinks: about two cans or bottles per guest per hour for a pizza party — see how many cans of soda for 100 guests and scale down.
  • Plates and napkins: two small plates each; pizza boxes make poor serving trays once they get soggy.

For a team party, the appetite setting matters. Teenage athletes at four slices each push the order to fifteen large pizzas; adults at a lunch meeting with salad might eat two each, and eight large pizzas would do. Count the kids separately in the children box — each counts as half.

Smaller group: how many pizzas for 20 people. Wings on the side: how many wings for 20 people — multiply by one and a half for thirty.

What you’ll need

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Frequently asked questions

How many extra large pizzas for 30 people?

9 pizzas of 16 inches at 3 large-slice equivalents each.

How many pizzas for 30 kids?

About 6 pizzas of 14 inches at 1½ slices each.

How many pizzas for 40 people?

15 pizzas of 14 inches at 3 slices each.

Sources