The formula to calculate the area of a circle in circular mils (A) is:
\[ A = \frac{\pi \cdot D^2}{4} \div (7.854 \times 10^{-7}) \]
Where:
A circular mil is defined as the area of a circle whose diameter is one mil. One mil is equal to one-thousandth of an inch or 0.0254 mm. The area of a circle whose diameter is one mil is equal to 0.7854 mil² = (7.854 × 10⁻⁷) in².
Let's assume the following value:
Using the formula:
\[ A = \frac{\pi \cdot 0.5^2}{4} \div (7.854 \times 10^{-7}) \approx 249,999.4 \text{ cmil} \]
The area in circular mils (A) is approximately 249,999.4 cmil.
