Area of a 30 Inch Circle

What is the area of a circle with a DIAMETER of 30 inches (radius of 15 inches)? How big is a 30 inch circle?
ft
in
Area of a 30″ diameter circle
706.86square inches
4.9087square feet
0.54542square yards
4,560.4square centimeters
0.45604square meters
(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 in2 ft2 cm2
30.0 in 706.9 4.909 4,560
30.1 in 711.6 4.942 4,591
30.2 in 716.3 4.974 4,621
30.3 in 721.1 5.007 4,652
30.4 in 725.8 5.041 4,683
Diameter in2 ft2 cm2
30.5 in 730.6 5.074 4,714
30.6 in 735.4 5.107 4,745
30.7 in 740.2 5.140 4,776
30.8 in 745.1 5.174 4,807
30.9 in 749.9 5.208 4,838