Our calculator is based on extensive research and real-world testing. While individual appetites may vary, we've found our recommendations to be accurate for about 90% of groups. Factors like time of day, other food being served, and activity level can affect actual consumption, so consider these when placing your final order.

Thin crust pizzas typically have more slices (usually 8 per large pizza) than thick crust pizzas (usually 6 per large pizza). Additionally, thick crust slices are more filling, so people may eat fewer slices. Our calculator accounts for both the number of slices and the increased satiety from thick crust.

It's often a good idea to round up to the nearest whole pizza, especially if your calculation results in a fraction. For example, if the calculator suggests 4.3 large pizzas, ordering 5 would be prudent. This accounts for variations in appetite and ensures you won't run out.

Our algorithm assumes adults will eat about 50% more pizza than children. For example, if an adult would eat 3 slices for a meal, a child would eat about 2 slices in the same situation. This ratio adjusts based on the hunger level you select.

If you're serving substantial side dishes (salads, pasta, etc.), you might want to reduce the hunger level by one step. For example, if it's a full meal with sides, you might select "snack" instead of "meal" in the calculator to account for people eating less pizza.

Yes! The calculator works for groups of any size. For very large groups (100+ people), the law of averages makes our calculations even more accurate. You might also consider ordering a mix of pizza sizes to accommodate different appetites.

Our calculations are based on standard pizza sizes: Small (10" diameter, 6 slices), Medium (12", 8 slices), Large (14", 8 slices for thin, 6 for thick), and Extra Large (16", 10 slices for thin, 8 for thick). If your pizzeria uses different sizing, you may need to adjust accordingly.

The calculator doesn't account for dietary restrictions. If you have guests with special dietary needs (vegetarian, gluten-free, etc.), you may need to order additional specialty pizzas beyond what the calculator recommends.

Absolutely! The calculator works just as well for homemade pizza. Just make sure your homemade pizzas are roughly the same size as the standard sizes mentioned above, or adjust your dough quantities accordingly.

Our calculator is based on data from hundreds of pizza parties and events, combined with nutritional research about average consumption patterns. Most people tend to either overestimate (leading to waste) or underestimate (leading to hungry guests) when guessing on their own. Our tool removes the guesswork!