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Pizza Size Comparison
Compare total area, usable area and price efficiency between two pizza offers.
InputsUpdates instantly as you type.
Live resultLIVE
Option A12 inUsable area: 157.08 in²
12 inUsable area: 157.08 in²Option B18 inUsable area: 201.06 in²
18 inUsable area: 201.06 in²Option B gives more usable area per unit of price.
Quick answer
Pizza value depends on area, not diameter alone. This calculator compares total and crust-adjusted area, then divides price by usable area to identify the lower-cost offer or show a tie.
- Best for
- Comparing two round pizza offers with known diameter, quantity, price and an optional crust width.
- Not for
- Estimating servings, nutrition, toppings or whether two pizzas will feed a particular group.
Formula and assumptions
Total area = quantity × π × (diameter ÷ 2)². Usable area = quantity × π × max(radius minus crust, 0)². Lower price per usable area wins.
Prices and crust widths are your inputs. The result is a geometric comparison, not a serving recommendation.
Worked example
Pizza Size Comparison
Inputs
- Diameter
- 12 in
- Quantity
- 2
- Price
- 24
- Crust width
- 1 in
- Diameter
- 18 in
- Quantity
- 1
- Price
- 22
- Crust width
- 1 in
Live result
- Option A
- 157.08 in²
- Option B
- 201.06 in²
- Live result
- Option B gives more usable area per unit of price.
pizza size comparisontwo small vs one large pizzapizza area per price
FAQ
Questions this calculator answers
Are two 12-inch pizzas bigger than one 18-inch pizza?
Enter 12 inches with a quantity of two in one option and 18 inches with a quantity of one in the other. The calculator compares their circular areas and shows the difference. Price and crust width can change which option offers better value.
Why does the calculator remove the crust area?
The optional crust width estimates the inner area you may treat as usable. Set crust width to zero if you want to compare the full circular area instead.
Does the larger-area option always cost less per bite?
No. The result uses the prices you enter and reports price per unit of usable area. It does not measure slice size, toppings, thickness or how much each person will eat.
One calculator, several real tasks
