FAQ: Area of a Circle Calculator
1. How is the area calculated?
Area = π × radius² (using π ≈ 3.14159).
2. What units are used?
Input in inches, output in square inches—standard in USA.
3. Can I use diameter instead?
No, enter radius (diameter / 2); add a note if needed.
4. Why use inches in USA?
Inches are common for measurements like pizza sizes or wheels.
5. What if radius is zero?
Area is zero; enter positive values for real circles.
6. Is the result precise?
Rounded to 4 decimal places; use more for exact math.
7. Is my data private?
Yes, calculations are local—no data is stored or sent.