How Many Pizzas for 20 People?
If you’re feeding 20 people, the short answer is usually 7 to 9 large pizzas if pizza is the main food. If there are sides, salads, garlic bread, or it’s more of a grazing setup, you can often get away with 6 to 7 large pizzas.
The exact number depends on one thing people always ignore: how hungry the group actually is. Twenty adults at dinner is not the same as 20 people at a kids’ party with chips and cake everywhere.
Quick rule of thumb
- Light eaters or lots of sides: 6 to 7 large pizzas
- Normal appetite: 7 to 8 large pizzas
- Hungry crowd: 8 to 9 large pizzas
Assuming a large pizza gives you about 10 slices, and each adult eats around 3 slices, 20 adults need about 60 slices. That lands you at 6 large pizzas bare minimum, but that’s a bit tight. In real life, 7 or 8 is safer.
Best practical answer: For 20 adults, order 8 large pizzas unless you know the group eats lightly.
What changes the number?
Kids vs adults: Kids usually eat 1 to 2 slices, not 3 or 4. A mixed group needs fewer pizzas than 20 hungry adults.
Lunch vs dinner: Lunch groups usually eat less than dinner groups.
Other food: Garlic bread, chips, wings, and dessert all reduce pizza demand.
Leftovers: If you want the comfortable option, order one extra. Cold leftover pizza is not exactly a tragedy.
Use our Pizza Party Calculator for guest count, appetite level, and pizza size.
FAQs
How many pizzas for 20 adults?
Usually 7 to 9 large pizzas, with 8 being the safest middle ground.
How many pizzas for 20 people with sides?
If you’ve got enough sides, 6 to 7 large pizzas is often enough.
Should I round up?
Yes. If you’re between numbers, round up. Running out is much worse than having leftovers.