Area of a 4 Foot Circle

What is the area of a circle with a DIAMETER of 4 feet (radius of 2 feet)? How big is a 4 foot circle?
ft
in
Area of a 4′ diameter circle
12.566square feet
1,809.6square inches
1.3963square yards
1.1675square meters
11,675square 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.

Diameter
Circle Area by Diameter
(results are rounded)
Diameter ft2 in2 m2
4′0″ 12.57 1,810 1.167
4′1″ 13.10 1,886 1.217
4′2″ 13.64 1,963 1.267
4′3″ 14.19 2,043 1.318
4′4″ 14.75 2,124 1.370
4′5″ 15.32 2,206 1.423
Diameter ft2 in2 m2
4′6″ 15.90 2,290 1.478
4′7″ 16.50 2,376 1.533
4′8″ 17.10 2,463 1.589
4′9″ 17.72 2,552 1.646
4′10″ 18.35 2,642 1.705
4′11″ 18.99 2,734 1.764