Pizza Comparison Calculator

It depends on the diameters and prices. Because pizza area scales with the square of the radius, a larger pizza almost always gives you more area per dollar than multiple smaller ones. Use this calculator to plug in the exact sizes and prices — you'll likely find the large pizzas win on value.

Yes. Pizzerias advertise pizza by diameter, but what you actually eat is the surface area. A 16-inch pizza has about 201 in², while a 12-inch pizza has about 113 in². The larger pizza has roughly 78% more eating area despite only being 33% bigger in diameter.

Use the formula: Area = π × (diameter / 2)². For example, a 14-inch pizza has an area of π × 7² ≈ 153.94 in². This calculator does that math automatically for both pizzas so you can focus on the comparison.

Absolutely. The area tells you how much food you're actually getting. Two 12-inch pizzas (226 in² total) give you less pizza than one 18-inch pizza (254 in²), even though you're paying for two. Always compare by area — not diameter — to get the best deal.

Cost per square inch is the price divided by the total pizza area. It's the fairest way to compare pizzas of different sizes and prices. The pizza with the lower cost per square inch gives you more food for your money.

Enter the quantity for each pizza in the respective quantity field. The calculator multiplies the price and area by the quantity, so you get an accurate total area and total cost comparison even when ordering more than one of each size.

Because area grows with the square of the radius. When a pizza's diameter doubles, its area quadruples. Pizzerias generally don't price larger pizzas proportionally higher, so the cost per square inch drops significantly as the size increases.

Set Pizza 1 to the medium size with quantity 2 (and enter the price of one medium), then set Pizza 2 to the large with quantity 1. The calculator will show the total area and cost per square inch for each option so you can see which is the better deal at a glance.