Free online area of a circle calculator which helps you calculate the are of any circle , given its radius. Supports many different metrics such as in, ft, yd, mm, cm, meters, etc. Area of a circle is the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula, A = πr2, (Pi r-squared) where r is the radius of the circle . The unit of area is the square unit, such as m2, cm2, etc. To find the area of a circle, use the formula A = π • r2 , where r is the radius of the circle. If you only know the diameter of the circle, then use the formula A = π • (d/2)2 where d is diameter. Calculate the area of a circle with ease. Our Area of a Circle Calculator simplifies the process—simply input the radius, diameter, or circumference of the circle , and let the tool compute the area for you. How To calculate the area of a circle ?
