# Area of a 1 Foot Circle

What is the area of a circle with a DIAMETER of 1 feet (radius of 0.5 feet)? How big is a 1 foot circle?
Diameter
cm
Diameter
ft
in
Diameter
meters
Diameter
yards
Units
Area of a 1′ diameter circle
 0.7854 square feet 113.1 square inches 0.087266 square yards 0.072966 square meters 729.66 square centimeters
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
1′0″ 0.7854 113.1 0.07297
1′1″ 0.9218 132.7 0.08563
1′2″ 1.069 153.9 0.09931
1′3″ 1.227 176.7 0.1140
1′4″ 1.396 201.1 0.1297
1′5″ 1.576 227.0 0.1464
1′6″ 1.767 254.5 0.1642
1′7″ 1.969 283.5 0.1829
1′8″ 2.182 314.2 0.2027
1′9″ 2.405 346.4 0.2235
1′10″ 2.640 380.1 0.2452
1′11″ 2.885 415.5 0.2680