# Area of a 90 Centimeter Circle

What is the area of a circle with a DIAMETER of 90 cm (radius of 45 cm)? How big is a 90 centimeter circle?
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Area of a 90cm diameter circle
 6,361.7 square centimeters 0.63617 square meters 986.07 square inches 6.8477 square feet 0.76086 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
90.0 cm 6,362 986.1 6.848
90.1 cm 6,376 988.3 6.863
90.2 cm 6,390 990.5 6.878
90.3 cm 6,404 992.7 6.893
90.4 cm 6,418 994.9 6.909
90.5 cm 6,433 997.1 6.924
90.6 cm 6,447 999.3 6.939
90.7 cm 6,461 1,001 6.955
90.8 cm 6,475 1,004 6.970
90.9 cm 6,490 1,006 6.985