Area of a 18 Foot Circle
What is the area of a circle with a DIAMETER of 18 feet (radius of 9 feet)? How big is a 18 foot circle?
Diameter
cm
Diameter
ft
in
Diameter
meters
Diameter
yards
Units
Area of a 18′ diameter circle
| 254.47 | square feet |
| 36,644 | square inches |
| 28.274 | square yards |
| 0.0058418 | acres |
| 23.641 | square meters |
| 236,410 | square centimeters |
| 0.0023641 | 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.