# Area of a 85 Centimeter Circle

What is the area of a circle with a DIAMETER of 85 cm (radius of 42.5 cm)? How big is a 85 centimeter circle?
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Area of a 85cm diameter circle
 5,674.5 square centimeters 0.56745 square meters 879.55 square inches 6.1080 square feet 0.67866 square yards
results may be rounded

#### Area of a Circle Formula

The area of a circle is pi times the square of its radius. The radius is half the diameter.

Area = π * (Diameter / 2)2

#### Diameter of a Circle

The diameter of a circle is the distance from one edge to the other, passing through the center. It is twice the radius.

Circle Area by Diameter
results may be rounded
Diameter cm2 in2 ft2
85.0 cm 5,675 879.5 6.108
85.1 cm 5,688 881.6 6.122
85.2 cm 5,701 883.7 6.137
85.3 cm 5,715 885.8 6.151
85.4 cm 5,728 887.8 6.166
85.5 cm 5,741 889.9 6.180
85.6 cm 5,755 892.0 6.195
85.7 cm 5,768 894.1 6.209
85.8 cm 5,782 896.2 6.223
85.9 cm 5,795 898.3 6.238