circular inch to mm²
39 unitsResult5.067075e+2
506.7075mm²
1 circular inch × 506.7075 = 506.7075 mm²
Convert Circular inch to Square millimeter (circular inch to mm²)
1 circular inch = 506.7075 square millimeters. Convert circular inch to square millimeters instantly, with the exact factor, the formula and a reference table of common values.
Formula
square millimeters = circular inch × 506.7075
circular inch to mm² conversion table
| circular inch | mm² |
|---|---|
| 1 circular inch | 506.7075 mm² |
| 2 circular inch | 1013.415 mm² |
| 3 circular inch | 1520.1225 mm² |
| 5 circular inch | 2533.5375 mm² |
| 10 circular inch | 5067.075 mm² |
| 20 circular inch | 10134.15 mm² |
| 50 circular inch | 25335.375 mm² |
| 100 circular inch | 50670.75 mm² |
| 250 circular inch | 126676.875 mm² |
| 500 circular inch | 253353.75 mm² |
| 1000 circular inch | 506707.5 mm² |
What is a circular inch?
A circular inch is the area of a circle one inch in diameter — about 0.0005067 square meters, slightly less than a square inch.
Measuring round things by their diameter keeps the math simple, so the unit turns up in older engineering tables for pipes, rods and cables.