circular inch to in²
39 unitsResult7.853982e-1
0.7853981958in²
1 circular inch × 0.7853981958 = 0.7853981958 in²
Convert Circular inch to Square inch (circular inch to in²)
1 circular inch = 0.7853981958 square inch. Convert circular inch to square inch instantly, with the exact factor, the formula and a reference table of common values.
Formula
square inch = circular inch × 0.7853981958
circular inch to in² conversion table
| circular inch | in² |
|---|---|
| 1 circular inch | 0.7853981958 in² |
| 2 circular inch | 1.570796392 in² |
| 3 circular inch | 2.356194587 in² |
| 5 circular inch | 3.926990979 in² |
| 10 circular inch | 7.853981958 in² |
| 20 circular inch | 15.70796392 in² |
| 50 circular inch | 39.26990979 in² |
| 100 circular inch | 78.53981958 in² |
| 250 circular inch | 196.3495489 in² |
| 500 circular inch | 392.6990979 in² |
| 1000 circular inch | 785.3981958 in² |
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.