How much pizza for a kids' party

Plan on 2 slices for each child and 3 for each grown-up. A large pizza has 8 slices. Add up the slices, divide by 8, and round up.

The rule

Large pizzas = (kids × 2 + adults × 3) ÷ 8, rounded up. It's the same rule your Festidi plan uses, and it updates as replies come in.

Most kids ages 4 to 10 eat one or two slices at a party, because they're busy playing. Teenagers and adults eat closer to three. Rounding up leaves a little extra, which is what you want: leftover pizza freezes well, and running out doesn't.

Drop-off party: kids only

When parents drop off and leave, count only the kids.

Kids	Large pizzas
6	2
8	2
10	3
12	3
15	4
20	5
25	7
30	8

Kids and parents

For younger kids, parents usually stay, and they eat too. If you only know the total, Festidi assumes about 6 in 10 guests are kids and the rest are adults.

Guests	Kids	Adults	Large pizzas
10	6	4	3
15	9	6	5
20	12	8	6
25	15	10	8
30	18	12	9
40	24	16	12
50	30	20	15

Tips that save money and stress

Order for a set time. Ask for delivery about 15 minutes before you plan to serve, or pick it up yourself. Food works best about an hour into a two-hour party, after the first game.
Keep toppings simple. Most kids pick cheese. A split of about half cheese, a quarter pepperoni, and a quarter of something for the grown-ups covers most groups.
Ask about allergies first. Put a line on the invitation, then keep one safe option ready (for example, a gluten-free or dairy-free pizza ordered separately and kept apart).
Fill in around the pizza. A fruit tray and a veggie tray stretch the pizza and give kids something to graze on.

Not doing pizza? Plan the same way: about two small portions per child and three per adult, such as nuggets, sliders, or sandwich quarters.

Let Festidi count the slices

Add your guest count and Festidi works out pizzas, drinks, ice, and plates, then updates them as RSVPs come in.

Make your plan

Want other numbers? The party food calculator does drinks, ice, plates, and cake too.