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Pizza Value Calculator

Find which pizza size is the better deal by comparing price per square inch.

Inputs

Saved Scenarios

— select 2+ to compare

Pizza A ($/sq in)

0.1061

Pizza B ($/sq in)

0.0895

Spark says

How it's calculated

Formula

Price per sq in=Priceπ×(Diameter/2)2Price\ per\ sq\ in = \dfrac{Price}{\pi \times (Diameter/2)^2}
\pi \times (Diameter/2)^2
— Area of a circular pizza

What is the Pizza Value Calculator?

Because a pizza's area grows with the square of its diameter, a bigger pizza is almost always a better value per square inch than it first appears — this calculator makes that comparison exact instead of a gut feeling.

How to use it

  1. 1 Enter the price and diameter for the first pizza.
  2. 2 Enter the price and diameter for the second pizza.

Worked examples

$12 12-inch vs $18 16-inch

Pizza B (16-inch) is the better deal at about $0.0895/sq in vs $0.1061/sq in.

Try it

Frequently asked questions

Why is a bigger pizza usually a better deal?

Area scales with the square of the radius, but price usually doesn't scale as steeply — so a 16-inch pizza has nearly twice the area of a 12-inch one, but rarely costs twice as much.