Pizza Size Comparison Calculator

Bigger pizzas are not always the better buy, and eyeballing the menu rarely settles the question. This comparison cuts through the guesswork by working out what you pay per square inch at each size, so your money stretches as far as the dough does.

Each pizza's surface gets measured with the standard area-of-a-circle formula, πr², where 'r' is half the listed diameter. Dividing the price by that area gives a price per square inch, and the pizza with the lower figure is the better buy. Because the metric normalizes for cost, it lets you stack very different sizes against one another on an even footing. The calculator also shows how many of the smaller pizzas it takes to match one large and what they would cost together.

What the basic comparison leaves out can still swing real value: toppings, crust style, and promotional deals all play a part. Enter the full diameter exactly as it is advertised, since mixing up diameter and radius throws the whole result off. And because area climbs with the square of the radius, a larger pie can quietly carry far more pizza than its price suggests, or far less, which is exactly what this tool is built to reveal.