Area of Circle Calculator Widget

Area of Circle Calculator

Radius (r): cm

Area (A): 78.54 cm²

Visualization

Frequently Asked Questions

The area of a circle is calculated using the formula A = πr², where 'A' is the area, 'π' (pi) is a mathematical constant approximately equal to 3.14159, and 'r' is the radius of the circle.

The area of a circle is directly proportional to the square of its radius. This means if you double the radius, the area will quadruple (2² = 4).

Yes, you can. Rearranging the formula A = πr², you get r = √(A / π). So, you would divide the area by pi and then take the square root of the result.