Area of a 20 Inch Circle

What is the area of a circle with a DIAMETER of 20 inches (radius of 10 inches)? How big is a 20 inch circle?

Diameter

meters

Diameter

yards

Units

Area of a 20″ diameter circle

results may be rounded

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

Area = π * (Diameter / 2)²

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	in²	ft²	cm²
20.0 in	314.2	2.182	2,027
20.1 in	317.3	2.204	2,047
20.2 in	320.5	2.226	2,068
20.3 in	323.7	2.248	2,088
20.4 in	326.9	2.270	2,109
20.5 in	330.1	2.292	2,129
20.6 in	333.3	2.315	2,150
20.7 in	336.5	2.337	2,171
20.8 in	339.8	2.360	2,192
20.9 in	343.1	2.382	2,213