A round 10-inch pizza measures 10 inches across its diameter, or 25.4 cm. Its area is approximately 78.5 square inches. The number of slices depends on how it is cut; cutting more slices does not create more pizza.
Names such as personal, small, and medium vary by restaurant. Compare the stated diameter and crust style rather than relying on the size label alone.
How it compares with larger pizzas
| Round pizza diameter | Approximate area | Area compared with a 10-inch pizza |
|---|---|---|
| 10 inches | 78.5 square inches | 1.00 times |
| 12 inches | 113.1 square inches | 1.44 times |
| 14 inches | 153.9 square inches | 1.96 times |
| 16 inches | 201.1 square inches | 2.56 times |
These values use the area of a circle: π × (diameter ÷ 2)². For example, a 14-inch pizza has almost twice the area of a 10-inch pizza, assuming comparable shape and crust. A 10-inch square pizza is a different calculation: 10 × 10 gives 100 square inches.
How many slices and servings?
A restaurant might cut a 10-inch round pizza into four, six, or eight slices. Six equal slices would each cover about 13.1 square inches; eight would each cover about 9.8. There is no mathematically required slice count.
People’s appetites, crust thickness, toppings, and side dishes vary too much to promise one serving count. For a group, compare total pizza area and the restaurant’s portion guidance. Slices from different-size pizzas are not directly interchangeable.
Comparing value
Divide the menu price by the pizza’s area to compare price per square inch. Use the same crust style and comparable toppings, then account for any delivery fees. This is a size comparison, not a measure of nutrition, quality, or how much everyone will eat.
Do not infer a pizza’s weight or calories from diameter alone. A thin cheese pizza and a deep-dish pizza with the same diameter can have very different amounts of dough, toppings, and energy.
Will it fit a pan or appliance?
Measure usable cooking space, not just the appliance’s exterior or a pan’s advertised rim size. Handles, sloped sides, raised lips, and the appliance’s required clearances can reduce usable space. A nominal 10-inch skillet is not automatically a fit for a 10-inch pizza.
If you are comparing an appliance, see our microwave and air-fryer combination guide; its cavity and accessory dimensions matter more than the marketing name.
Tools for this job
Measure the appliance and the pan before ordering. A ruler may be all you need; buy a pan only if its usable diameter and material suit the appliance manual.
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Check the exact size, model, included parts, and seller listing before ordering. Search results can contain different products and variants.
Sources and method
Area and slice figures are calculated from the stated dimensions, rounded to one decimal place. Serving sizes and nutrition are not inferred from those calculations.