Pizza Comparison
Compare pizza sizes by area and price per square inch. Enter diameters, quantities, and prices for two pizza options to find the best value for your money.
About This Calculator
The Pizza Comparison Calculator helps you make the smartest choice when ordering pizza by comparing two different pizza options by area, total price, and price per square inch. Whether you are deciding between two medium pizzas or one large pizza, or comparing prices across different pizzerias, this tool reveals which option truly gives you more pizza — and better value — for your money.
Pizza is sold by diameter, but we eat by area. The area of a circular pizza is calculated using the formula A = π × (d/2)². Because area scales with the square of the radius, a seemingly small difference in diameter results in a large difference in actual pizza. For example, a 16-inch pizza (201 sq in) has 78% more area than a 12-inch pizza (113 sq in) — but is usually far less than 78% more expensive. This calculator computes the total area, total price, and price per square inch for each option, then shows you the area difference percentage and identifies the better value.
How to Use
Enter the diameter (in inches), quantity, and price per pizza for Option 1 and Option 2. The calculator works with any pizza size from personal 6-inch pies to extra-large 36-inch party pizzas. You can compare any combination — one large vs. two mediums, three smalls vs. two larges, or any other scenario.
Regional Notes
United States: Uses inches for diameter and USD for pricing. Most US pizzas range from 10-18 inches. Standard slice counts are 6 for 10-inch, 8 for 14-inch, 10 for 16-inch, and 12 for 18-inch pizzas.
India: Uses inches for diameter and INR for pricing. Indian pizzerias typically offer 6-inch personal, 10-inch medium, and 12-inch large pizzas. Use actual prices from your local Domino's, Pizza Hut, or local pizzeria.
United Kingdom: Uses inches for diameter and GBP for pricing. UK pizzas typically range from 9-inch personal to 13-inch large. Enter the diameter and price as shown on the menu for the best comparison.
Frequently Asked Questions
How do you compare pizza sizes using area?
Pizza area is calculated using the formula for the area of a circle: π × (diameter/2)². A 12-inch pizza has about 113 sq in of area, while a 16-inch pizza has about 201 sq in — that is 78% more pizza for just a few inches more in diameter.
Is it better to buy two medium pizzas or one large pizza?
Two 12-inch medium pizzas give you about 226 sq in of total area, while one 16-inch large pizza gives you about 201 sq in. Two mediums give more area, but the price difference matters — use this calculator to compare both area and cost per square inch.
How do I find the best value pizza?
Divide the total price by the total area in square inches to get the price per square inch. The pizza with the lower price per square inch is the better value. This calculator automatically computes this for both options.
Does pizza diameter double the amount of pizza?
No. Area scales with the square of the radius, not linearly with diameter. Doubling the diameter from 10 inches to 20 inches actually quadruples the area (from 79 sq in to 314 sq in).
Why do pizzerias use diameter instead of area?
Pizzerias use diameter because it is a simple linear measurement that makes smaller pizzas seem larger than they really are. A 14-inch pizza sounds close to a 16-inch pizza, but the 16-inch has 30% more area.
How many square inches is a typical pizza slice?
A typical slice from a 14-inch pizza cut into 8 slices is about 19 sq in. From a 16-inch pizza cut into 8 slices, each slice is about 25 sq in. Larger pizzas give bigger slices for the same number of cuts.
Is this calculator free to use?
Yes, this pizza comparison calculator is completely free to use with no registration, hidden charges, or usage limits. You can save and share your calculations via the URL.
Can I save and share my pizza comparison results?
Yes, the URL automatically saves your inputs so you can bookmark, share, or revisit the exact pizza comparison. Send the link to friends when ordering together.