Inch diameter to square inches
Type a value in in to get it in in² instantly.
254.5in²
That's about the same as an 18-inch extra large. That is about 18 slices the size of a 12-inch pizza’s eighths.
Convert the other way: in² to in
What it means
How much pizza is that?
Area of a flat circle, crust included. Thicker or deep-dish pizzas hold more per square inch.
The math
How to convert in to in²
area = π × (diameter ÷ 2)²; a 16″ pizza is 3.1416 × 8² = 201 in².
Example: 18 in = 254.469 in².
Every unit
That pizza in every unit
Tables
in to in² conversion table
| in | in² |
|---|---|
| 6 in | 28.2743 in² |
| 8 in | 50.2655 in² |
| 9 in | 63.6173 in² |
| 10 in | 78.5398 in² |
| 11 in | 95.0332 in² |
| 12 in | 113.097 in² |
| 13 in | 132.732 in² |
| 14 in | 153.938 in² |
| 15 in | 176.715 in² |
| 16 in | 201.062 in² |
| 18 in | 254.469 in² |
| 20 in | 314.159 in² |
| 24 in | 452.389 in² |
| 28 in | 615.752 in² |
in² to in conversion table
| in² | in |
|---|---|
| 28.3 in² | 6.00272 in |
| 50.3 in² | 8.00275 in |
| 63.6 in² | 8.99878 in |
| 78.5 in² | 9.99746 in |
| 95 in² | 10.9981 in |
| 113 in² | 11.9948 in |
| 133 in² | 13.0131 in |
| 154 in² | 14.0028 in |
| 177 in² | 15.0121 in |
| 201 in² | 15.9975 in |
| 254 in² | 17.9834 in |
| 314 in² | 19.9949 in |
| 452 in² | 23.9897 in |
| 616 in² | 28.0056 in |
Quick answers
Quick answers
- How many in² is 1 in?
- 1 in is 0.785398 in².
- How many in² is 10 in?
- 10 in is 78.5398 in².
- How many in² is 18 in?
- 18 in is 254.469 in².
The units
About these units
Inch diameter (in)
Diameter in inches.
Square inches (in²)
Area in square inches.
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