# Area of a 20 Foot Circle

What is the area of a circle with a DIAMETER of 20 feet (radius of 10 feet)? How big is a 20 foot circle?
Diameter
cm
Diameter
ft
in
Diameter
meters
Diameter
yards
Units
Area of a 20′ diameter circle
 314.16 square feet 45,239 square inches 34.907 square yards 0.0072121 acres 29.186 square meters 291,860 square centimeters 0.0029186 hectares
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 ft2 in2 m2
20′0″ 314.2 45,240 29.19
20′1″ 316.8 45,620 29.43
20′2″ 319.4 46,000 29.67
20′3″ 322.1 46,380 29.92
20′4″ 324.7 46,760 30.17
20′5″ 327.4 47,140 30.42
20′6″ 330.1 47,530 30.66
20′7″ 332.8 47,920 30.91
20′8″ 335.5 48,310 31.16
20′9″ 338.2 48,700 31.42
20′10″ 340.9 49,090 31.67
20′11″ 343.6 49,480 31.92