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Pizza Size Calculator

Which pizza size gives the best value per slice?

🍕Pizza Size Calculator — Best Value

A pizza size calculator compares the area and value of different pizza sizes, revealing whether a larger pizza is genuinely better value. Because pizza area grows with the square of the radius (πr²), a 16-inch pizza contains significantly more than twice the pizza of a 10-inch.

  1. 1Calculate the area of each pizza: A = π × (diameter / 2)²
  2. 2Calculate price per square inch: Price ÷ Area
  3. 3The pizza with the lower price per square inch is better value
10" at £10 vs 14" at £14=14" is 28% cheaper per in²78.5 in² vs 153.9 in²
12" at £12 vs 16" at £15=16" is 31% better valueLarger size almost always wins
DiameterRadiusArea (in²)vs 10" pizza
10"5"78.5 in²1× (baseline)
12"6"113.1 in²1.44×
14"7"153.9 in²1.96×
16"8"201.1 in²2.56×
18"9"254.5 in²3.24×

Fun Fact

A single 18-inch pizza has more area than two 12-inch pizzas combined. The 18" has 254 in² vs 226 in² for two 12" pizzas.

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