Pizza Size Calculator
Find out whether ordering two medium pizzas or one large pizza is the better financial and culinary deal. Because pizza area scales with the square of the radius, larger pizzas offer surprisingly more food per dollar. This tool compares total edible area and cost per square inch.
Diameter of first pizza (e.g. 10" Medium)
Menu price for first pizza
Number of Pizza 1 ordered (e.g., 2 medium pizzas)
Diameter of second pizza (e.g. 16" Extra Large)
Menu price for second pizza
Number of Pizza 2 ordered (e.g., 1 large pizza)
Identifies which ordering option provides cheaper pizza per square inch
How to Use This Calculator
- Enter the diameter and menu price of the first pizza option (e.g., two 10-inch mediums for $12.99 each).
- Enter the diameter and price of the second option (e.g., one 16-inch extra large for $19.99).
- Compare the price per square inch and total area to choose the best value deal.
Formula & Calculation Methodology
Because area expands geometrically with the square of the radius, a 16-inch pizza contains 201 square inches—more than double the 78.5 square inches of a 10-inch pizza. Comparing cost per square inch reveals true unit value.
Worked Example
Comparing two 10" pizzas ($12.99 each, $25.98 total) against one 16" pizza for $19.99
Frequently Asked Questions
Why is one 16-inch pizza bigger than two 10-inch pizzas?↓
The area of a circle equals π × r². Two 10-inch pizzas offer 2 × (π × 5²) = 157.1 square inches. One 16-inch pizza offers π × 8² = 201.1 square inches—giving you 28% more total pizza and usually at a lower price.
Does crust thickness alter the calculation?↓
This calculation measures total surface area. Thin-crust pizzas feature higher sauce-and-cheese density per square inch, whereas deep-dish or stuffed-crust pizzas have more vertical dough volume.
How many slices are standard in a 10", 14", and 16" pizza?↓
Standard pizzerias cut 10-inch personal pizzas into 6 slices, 12-to-14-inch medium/large pizzas into 8 slices, and 16-to-18-inch extra large pizzas into 10 or 12 slices.
What limitation should I consider regarding toppings variety?↓
While one large pizza is almost always cheaper per square inch, ordering two smaller pizzas allows you to satisfy differing dietary preferences or topping choices (such as vegetarian vs meat lovers).
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Open calculator →Source Citation & Disclaimer
Informational tool only; not licensed tax, legal, or financial advice.