How many pizzas for 20 people?
For 20 people at 3 slices each, order 8 pizzas of 14 inches — 64 slices, enough for 60 with a few spare.
How to work it out
- 20 adults × 3 large slices = 60 slices of a 14 in pizza (19.2 sq in each)
- = 1,155 sq in ÷ 154 sq in per 14 in pizza = 8 pizzas (64 slices)
Twenty is a common pizza order: an office lunch, a birthday party, a team night. Three slices each makes it dinner, and eight large pizzas covers that with four slices left over.
Adjust for your project
More options: Kids · Cut · Extra
- Slices (at this size and cut)
- 64 slices
- Same amount in 14 in large pizzas
- 7.5
- Adults fed per pizza
- 2.7
- Area of one pizza
- 154 sq in (993 cm²)
Pizzas for your guests by size (slices each as above)
| Pizza size | Pizzas to order | Slices (at this size and cut) | Adults fed per pizza |
|---|---|---|---|
| 10 in small | 15 pizzas | 120 slices | 1.4 |
| 12 in medium | 11 pizzas | 88 slices | 2 |
| 14 in large | 8 pizzas | 64 slices | 2.7 |
| 16 in XL | 6 pizzas | 48 slices | 3.5 |
| 18 in | 5 pizzas | 40 slices | 4.4 |
Large or extra large for twenty?
Twenty adults at three slices of a 14 in large come to 60 slices — 1,155 square inches of pizza. Eight large pizzas give 1,232 square inches, which is the right answer for a large order. Six 16 in extra-large pizzas give 1,206 square inches, so they cover the same crowd in fewer boxes, and fewer bigger pizzas are often cheaper per square inch. Check the menu prices against the areas before ordering.
| Order | Slices | Square inches | Enough for 20 at 3 slices? |
|---|---|---|---|
| 8 large (14 in) | 64 | 1,232 | yes |
| 6 extra large (16 in) | 48 (bigger slices) | 1,206 | yes |
| 10 medium (12 in) | 80 (smaller slices) | 1,131 | just under — order 11 |
Adjusting for the party
- With wings or salad: two slices each is plenty — five large pizzas.
- Teenagers: four slices each, so ten large pizzas.
- Kids’ party with parents: count the children in the children box; ten kids and ten adults plan like fifteen adults, so six large.
- Toppings: for twenty, three cheese, three pepperoni and two specialty is a safe split.
Wings for the same group are in how many wings for 20 people. A bigger group: how many pizzas for 30 people. Per-pizza numbers are in how many slices in a large pizza.
Different size? Use the full Pizza Party Calculator.
What you’ll need
- Heavy-duty paper plates (bulk)Budget price
Sturdy plates that do not fold under a scoop of baked beans. Get small ones too for dessert.
See options on Amazon (opens in a new tab) - Dinner napkins (bulk)Budget price
Napkins go faster than anything else on the table, especially with wings and barbecue.
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Frequently asked questions
How many extra large pizzas for 20 people?
6 pizzas of 16 inches, at 3 large-slice equivalents each.
How many pizzas for 20 people with other food?
5 pizzas of 14 inches at 2 slices each.
How many pizzas for 20 teenagers?
10 pizzas of 14 inches at 4 slices each.
Other common sizes
- How many pizzas for 30 people — 12 pizzas
- How many slices in a large pizza — 8 slices
Sources
- Domino’s — Nutrition guide (serving sizes by pizza size) (opens in a new tab) — Hand-tossed 12 in medium, 14 in large and 16 in extra large are each listed as 1/8 of a pizza per slice; New York style as 1/6.