To convert square inches to circular inches, multiply the value by 1.27324. To go the other way, multiply circular inches by 0.785398 to get square inches.
| Square Inches (in²) | Circular Inches (cir in) |
|---|---|
| 1 in² | 1.27324 cir in |
| 2 in² | 2.54648 cir in |
| 5 in² | 6.3662 cir in |
| 10 in² | 12.7324 cir in |
| 20 in² | 25.4648 cir in |
| 50 in² | 63.662 cir in |
| 100 in² | 127.324 cir in |
| 500 in² | 636.62 cir in |
| 1,000 in² | 1,273.24 cir in |
Square inch (in²). A square inch is the area of a square with 1-inch sides (6.4516 cm²).
Circular inch (cir in). A circular inch is the area of a circle 1 inch across (π/4 square inches).
There are 1.27324 circular inches in one square inch.
Multiply the number of square inches by 1.27324. For example, 10 square inches equal 12.7324 circular inches.
One circular inch equals 0.785398 square inches.