How many pizzas for 21 people?
Order 8 large pizzas for 21 adults. Make it 6 for light eaters or 11 for a very hungry group. Change the details below to fit your party.
Each pizza drawn with its slices. Faded slices are the leftovers.
21 people, every pizza size
The count changes a lot with the size you order. A small pizza has less than half the area of an extra large one.
| Pizza size | Light eaters | Average | Very hungry |
|---|---|---|---|
| 10-inch small (6 slices) | 11 | 16 | 21 |
| 12-inch medium (8 slices) | 8 | 11 | 15 |
| 14-inch large (8 slices) | 6 | 8 | 11 |
| 16-inch extra large (8 slices) | 5 | 7 | 9 |
| 18-inch extra large (8 slices) | 4 | 5 | 7 |
| Guests | Pizza only | With sides or dessert |
|---|---|---|
| All adults | 8 | 6 |
| Half adults, half kids | 7 | 5 |
| All kids | 6 | 4 |
The math for 21 people
An average adult eats 3 slices of a large pizza. For 21 people that is 21 × 3 = 63 slices. A large pizza has 8 slices, so 63 ÷ 8 = 7.875, which rounds up to 8 pizzas. You will have about 1 slice to spare.
Light eaters average 2 slices, which brings the order down to 6. A hungry group at 4 slices each needs 11.
Ordering for a crowd of 21
At 21 people, call the shop a day ahead. An order this size takes real oven time, and most pizzerias will give you a pickup or delivery window if you ask early.
Have the pizzas arrive in two waves, 20 to 30 minutes apart, so the second half is still hot. Keep toppings simple: cheese, pepperoni, one vegetable and one meat. Ask whether the shop has a bulk or party price.
Between two numbers? Round up. Cold pizza keeps for three to four days in the fridge, and running out is the only real way to get a pizza party wrong.
Questions about pizza for 21
How many large pizzas for 21 people?
Order 8 large 14-inch pizzas for 21 adults with average appetites. That is 64 slices, about 3.0 per person.
How many pizzas for 21 kids?
For 21 children, order 6 large pizzas. Kids eat about 2 slices each, and plain cheese is the safest choice.
How many medium pizzas feed 21 people?
You need 11 medium 12-inch pizzas for 21 average adults. Mediums are smaller than they look: a 12-inch pizza has about a quarter less pizza than a 14-inch.
How many 16-inch pizzas for 21 people?
7 extra large 16-inch pizzas will feed 21 average adults.
How much pizza for 21 people if there are sides?
With wings, salad or dessert on the table, 6 large pizzas is enough for 21 adults. People eat about a quarter less pizza when there is other food.
How many pizzas for 21 hungry people?
For 21 very hungry adults, such as teenagers or a sports team, order 11 large pizzas. That allows 4 slices each.