Diameter alone understates the advantage of a larger pizza. Because area is based on the radius squared, a small increase in diameter can add a large amount of pizza.
What the number can tell you
Price per square inch helps compare round pizzas of similar thickness and topping level. It reveals when a larger pizza provides more surface area for each dollar.
What it cannot tell you
The calculation does not measure crust thickness, ingredient quality, topping quantity, included sides, delivery fees or how much food will be wasted.
Compare like with like
A thin 16-inch cheese pizza and a 12-inch stuffed meat pizza are not equivalent foods. Use the tool within the same restaurant or style where possible.
Remember the final checkout
Add topping charges, tax, service fees and delivery costs before deciding which order is cheaper.
Example: 12-inch versus 16-inch
At CA$18, a 12-inch pizza costs about CA$0.16 per square inch. At CA$26, a 16-inch pizza costs about CA$0.13 per square inch. The larger pizza costs more overall but provides more listed surface area for each dollar.
Why crust lovers may choose differently
Price per area treats every square inch equally. Two smaller pizzas create more outer circumference and therefore more crust. A group that values crisp edge pieces or wants two topping combinations may prefer that trade-off.