The below given is the area of circular field formula to calculate the circle field area on your own. According to this circular field area formula dividing the products of π, squared radius value and the portion of the circle with the products of 360 and 43560 will give you the field area. Here 360 in the formula denotes the 360 degrees. The achieved field area value range will be based on the units of input values you substitute in the formula.

Where,

a = Circular Field Area

r = Radius(ft)

c = Portion of the Circle

The above area of circular field formula is a simple formula which is derived from the area of circle formula which is just the product of π and radius squared.