If you’ve ever been the one responsible for ordering food for a group, you know the anxiety. How many pizzas for 20 people is one of those questions that sounds simple until you’re standing at the checkout screen second-guessing every number. Order too little and you’re making an apology run. Order too much and you’re paying for boxes nobody touches.
We feed large groups at Curry Pizza House every week office teams, birthday parties, school events. This guide gives you the actual numbers we use, broken down by pizza size and appetite level, so you can order with confidence.
How Many Pizzas for 20 People: The Numbers
The standard planning rule used across the restaurant industry is three slices per person for a casual meal. That’s a reasonable average for a mixed group of adults. For hungrier crowds teenagers, post-sport groups, working lunches that run long move it to four slices per person. For lighter occasions like a mid-morning office event or a party with multiple food options, two slices is usually enough.
For 20 people at three slices each, you need 60 slices total. How many pizzas that translates to depends entirely on the size you order. Here’s the full breakdown:
| Pizza Size | Slices Per Pizza | Light Eaters (20 ppl) | Average (20 ppl) | Hungry (20 ppl) |
| 10–12 inch (Medium) | 6 slices | 7 pizzas | 9 pizzas | 11 pizzas |
| 14 inch (Large) | 8 slices | 5–6 pizzas | 7 pizzas | 9 pizzas |
| 18 inch (Extra Large) | 10–12 slices | 4 pizzas | 5–6 pizzas | 7 pizzas |
| Our standing recommendation for a standard group of 20 adults: 7 large pizzas or 6 extra-large pizzas. That covers the average appetite with one or two slices of buffer which matters more than most people think. |
How Many Large Pizzas for 20 People
A large pizza at most pizzerias and at Curry Pizza House runs 14 inches and cuts into 8 slices. That’s the size most people picture when they think of a group order. So how many large pizzas for 20 people?
The answer depends on your group. For a standard mixed group of adults at three slices each, seven large pizzas covers you with four slices to spare a comfortable buffer. For a hungrier group at four slices per person, go to nine. If you’re combining pizza with sides, salads, or calzones, you can trim the pizza count by one or two and still have everyone fed.
Accounting for Variety
One thing that trips people up with large orders: not every pizza gets eaten equally. A plain margherita will disappear faster than a more complex specialty pie. Our Chicken Tikka and Paneer Makhani calzones also draw attention at group events so if you mix pizza and calzones, plan one calzone per two people as a rough guide alongside your pizza count.
Dietary Mix Matters
In a group of 20, you’ll typically have two to four people who don’t eat meat and one or two avoiding dairy. Build at least two of your seven large pizzas around vegetarian options. If you know the group well, ask ahead. If you don’t, assume variety.
How Many 18 Inch Pizzas for 20 People
The 18-inch pizza is the most efficient format for group feeding. At 10 to 12 slices per pizza, it delivers more food per order, takes up less box space, and typically costs less per slice than ordering smaller sizes. So how many 18 inch pizzas for 20 people?
At 10 slices per pie and three slices per person, you need 60 slices that’s six 18-inch pizzas. At 12 slices per pie, five gets you there. We recommend ordering six as a baseline and adjusting up to seven if your group is known for big appetites or you’re not serving anything else alongside.
| The 18-inch pizza is consistently the best value format for groups above 15 people. Fewer boxes to manage, more slices per pie, and the larger surface area means more even topping distribution on every slice. |
Other Factors That Change Your Order
Time of Day
Lunch groups eat less than dinner groups. A 12:30pm office order for 20 people can usually be handled with six large pizzas. The same group at a 7pm event will work through eight without difficulty. Evening events with alcohol also trend higher factor in an extra pizza per ten people if that’s the setting.
Kids in the Group
Children under 12 average one to two slices, not three. If five of your twenty are kids, you’re really planning for 15 adult-equivalent appetites. That drops your count by roughly two large pizzas. Worth adjusting rather than over ordering.
Sides and Extras
Every side dish you add reduces pizza consumption. Garlic bread, salad, wings each one shaves roughly half a slice off the per-person average. If you’re building a full spread, start your pizza count at 2.5 slices per person instead of three.
- Garlic bread or breadsticks: reduce pizza count by 1 pizza for every 20 people
- Side salad: reduce per-person slice count from 3 to 2.5
- Wings or other protein: reduce pizza count by 1–2 pizzas depending on quantity
- Dessert: no significant effect on pizza consumption, but guests eat more slowly
How to Order for 20 People at Curry Pizza House
For any group order above 10 pizzas, we recommend calling or emailing us before placing the order online. This lets us confirm availability, lock in your delivery or pickup time, and make sure the variety mix works for your group.
We’ll also talk through whether a mix of pizza and calzones makes sense for some groups, calzones work better because they hold heat longer, are easier to eat standing up, and don’t require serving utensils. For seated dinners, a standard pizza mix is usually simpler.
Give us 24 hours’ notice where possible. Same-day group orders are possible but limit our flexibility on variety and timing. The more lead time you give, the better the result.
Save more on your next order by checking out our latest pizza deals on the coupons page.
The Short Version
Seven large pizzas or six 18-inch pizzas will feed 20 people at an average appetite. Adjust up by two if the group is hungry, down by one if you’re serving sides. Don’t guess use the table above and plan to the specific size you’re ordering. When you’re ready to place your group order, reach out to Curry Pizza House and we’ll make sure the numbers work out right on the day.
