Pizza Calculator for Groups

Last updated: Utility Calculators

Pizza Calculator
Children are counted as half an adult by default.

About This Calculator

This calculator helps you estimate how many pizzas to order based on group size and appetite.

It considers adults and children separately and adjusts based on selected pizza size.

How to Use

  1. Enter the number of adults and children.
  2. Adjust slices per adult based on appetite.
  3. Select the pizza size you plan to order.
  4. Click "Calculate" to see results.

Frequently Asked Questions

Does the calculator include children?

Yes, children are counted as half an adult in slice consumption.

Can I change pizza size?

Yes. Choose from Small to Extra Large, which affects the number of slices per pizza.

What is the default appetite setting?

Each adult is assumed to eat 3 slices. You can adjust this based on your group.

Pizza Chart

Estimated pizzas needed for 3 to 20 people (3 slices each, no children).

AdultsSmallMediumLarge
3 people221
4 people222
5 people322
6 people332
7 people433
8 people433
9 people543
10 people543
11 people654
12 people654
13 people754
14 people765
15 people865
16 people865
17 people976
18 people976
19 people1086
20 people1086

Pizza Size Chart

Standard pizza sizes and their typical slice counts.

SizeSlices
Small6
Medium8
Large10
Extra Large12