Pizza is sold by diameter, but you eat area. Double the diameter and you nearly quadruple the pizza — so the “bigger” one is almost always the better deal. And it’s not just dough: a bigger pie spreads its toppings over more surface and loses less of itself to the bare crust ring, so you get a higher share of actual topped pizza in every bite. Compare singles, two-for-one deals, or party packs side by side — punch in up to four and let the math settle the argument.
Topping coverage assumes a 1″ crust ring around the edge.
Enter a size and price for at least two pizzas and the best value will rise to the top.
A pizzeria menu tempts you with one number: the diameter. It feels honest — a 16-inch sounds only a little bigger than a 12-inch. But area grows with the square of the radius, so that modest-sounding jump is enormous. A 16-inch pie has roughly 78% more pizza than a 12-inch, yet it rarely costs 78% more. That gap is where value hides.
Crustworthy converts every pizza to its surface area, then divides the price by that area to get a true cost per square inch. The lowest true cost wins, full stop. Square and rectangular pies are handled too — area is just length × width.
Each pizza reports the same seven stats: its true cost per square inch (or cm), its total price, topping coverage, total area, per-pizza area when bundled, how much edible surface your money buys, and an estimated slice count. Topping coverage is the share of the pizza that actually carries toppings once you subtract a 1-inch crust ring around the edge — and it’s the stat most people don’t think about until they see it. A 12″ loses about 31% of its surface to bare crust; an 18″ only loses about 21%. That gap is real pizza you’re paying for either way.
Pizzerias love to bundle: 2 for $28, 3 mediums for $35, family pack. Set the quantity to match the deal and enter the total price — Crustworthy treats it as one purchase and divides the bundled dollars across the bundled area. That’s where the comparison gets honest. A single 17″ pizza has the exact same surface area as two 12″ pizzas (both come in at 227 in²), so if the 17″ costs less than the two-pack, it wins outright — and even at the same price it still wins on topped area, because it only loses one crust ring instead of two. The sticker price hides all of that. Total area for total dollars is the only honest comparison.
It began in Naples as cheap food for the poor, then a royal visit in 1889 gave us the Margherita — tomato, mozzarella, basil, the colours of the Italian flag. American soldiers fell for it on Italian soil in WWII and carried the craving home. The world has not looked back since, to the tune of about five billion pizzas a year.