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Free Party Tool

Pizza & Cake Calculator

Planning a party? Don't guess the food! Use our free calculator to know exactly how much to order.

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Pizza Party

Shopping List • 20 Guests

🎉
Pizza & Main
Large Pizzas (8 slices)
6

* Suggested: 30% Cheese, 40% Pepperoni, 30% Specialty

Drinks
2L Soda Bottles
5
Dessert
10-inch Round OR Quarter Sheet Cake
Best for 15-25 guests
Calculated by
OnePageParty.com

Party Food Calculator

Instant quantity estimates for your event

1. Party Details

2. Your Shopping List

Pizza + cake mode trims the pizza count a bit because dessert is part of the plan.

Pizzas Needed
Large (8 slices)
6

Topping Guide:

  • Cheese (30%)2
  • Pepperoni (40%)2
  • Specialty (30%)2
Recommended Cake
For 20 guests
10-inch Round OR Quarter Sheet Cake
Best for 15-25 guests
2L Soda Bottles
~10.0 Liters total
5

Budget Estimator

Track your total party cost

$
/ pizza
Pizza Cost (6 x $0)$0.00
Supplies (Est.)$15.00
Tax & Tip (20%)$0.00
Total Budget$15.00
Ordering exact quantities saves you ~$0 vs. standard catering estimates.
👆 Enter the price of one pizza above to unlock the full budget breakdown.

Confidence Interval

Saver3Pizzas
Standard6Pizzas
Feast10Pizzas

Step 2

What's Next After the Shopping List?

See the setup, serving, drinks, and cleanup plan that turns this pizza party list into a complete party.

Pizza And Cake Checklist

Use this after the food math is done. It catches the serving basics, dessert details, and cleanup items that usually get forgotten until the boxes and cake are already on the table.

🍕Serve The Slices

View pizza plates
View pizza cutter
View napkins
View party cups

🎂Cake Moment

View cake toppers
View dessert basics

⚙️Setup & Cleanup

View table covers
View trash bags
View leftover containers

Tip: 0 of 10 items completed

Quick links stay focused on the easiest-to-forget items.

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Finish The Table Setup

Helpful extras that make pizza night easier to serve

These picks help pizza-and-cake parties move faster, look more complete, and feel less improvised once guests start eating.

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Expert Note

Why do pizza parties usually need more serving support than hosts expect?

Pizza feels simple because the food itself is easy, but service gets messy fast once slices, drinks, and cake all hit at the same time. The right table basics keep the party from turning into a stack-of-boxes situation.

What helps most is separating the meal into moments: serving slices, handling drinks, and finishing with cake or themed extras. A few focused tools make the whole party feel more intentional without increasing the cooking workload.

How much pizza do I really need?

The general "Pizza Rule" is 3 slices per adult and 2 slices per child. However, this can vary based on:

  • Time of day: Lunch and dinner parties require more food than mid-afternoon snacks.
  • Other food: If you're serving heavy appetizers or sides, you can reduce the pizza count by 20%.
  • Party duration: For every hour past the 3-hour mark, guests tend to get hungry again.

Budgeting Tip: Wondering about the price? See our guide on how much pizza for 10 guests costs to plan your party budget effectively.

How many pizzas for 50 people?

For 50 guests, order about 18-20 large pizzas if pizza is the main meal. Start at 18 when you have hearty sides, and use 20 when pizza is the main focus.

How many pizzas for 100 people?

For 100 guests, plan for roughly 35-40 large pizzas depending on appetite and side dishes.

Cake Sizing Guide

Choosing the right cake size ensures everyone gets a slice without too much leftover. Standard round cakes serve:

6 Inch
6-8 Servings
8 Inch
8-12 Servings
10 Inch
12-25 Servings
12 Inch
25-40 Servings

Quick Estimates by Guest Count

Jump straight to the numbers for your party size

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