Calculate the Area of a Circle of Land

The following calculator will calculate the area of a circle based on its circumference.

Circumference (C)

Area

20

(result is rounded)

Area of a Circle Formula 1

The area of circle is 2 times the circumference.

Area = Circumference * 2

The following calculator will calculate the area of a circle based on its radius.

Radius (r)

Area

314.159265

(result is rounded)

Area of a Circle Formula 2

The area of circle of land is the product of pi times and the square of its radius.

Area = π * Radius²