Pizza Size Comparison Calculator
A 16-inch pizza is far more than twice a 10-inch one. See the maths.
Your numbers
$
$
Your results
Pizza A area (sq in)
Pizza A area (sq in)
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Pizza B area (sq in)
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Pizza A cost per sq in
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Pizza B cost per sq in
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Better value
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Pizza Size Comparison Calculator by TheCalcTools
How the Pizza Size Comparison Calculator works
Enter the diameter and price of two pizzas.
Area is π times the radius squared, so it grows with the square of the diameter.
Price divided by area gives the cost per square inch.
The formula
Area = π × (diameter ÷ 2)²Cost per sq in = price ÷ area
Worked example
Using the default values shown in the calculator:
| Pizza A diameter (in) | 12 |
|---|---|
| Pizza A price | $11 |
| Pizza B diameter (in) | 16 |
| Pizza B price | $17 |
- A: π × 6² = 113.1 sq in, costing $0.10 per sq in.
- B: π × 8² = 201.1 sq in, $0.08 per sq in. Better value: Pizza B.
Result:
| Pizza A area (sq in) | 113.1 |
|---|---|
| Pizza B area (sq in) | 201.1 |
| Pizza A cost per sq in | $0.10 |
| Pizza B cost per sq in | $0.08 |
| Better value | Pizza B |
Frequently asked questions
Why does a bigger pizza cost less per slice?
Area grows with the square of the diameter, but the price usually rises more slowly.
Does crust thickness matter?
Yes. This tool compares surface area only, so thick-crust or deep-dish pizzas may deliver more food than their area suggests.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.