Area of a 13 Inch Circle

What is the area of a circle with a DIAMETER of 13 inches (radius of 6.5 inches)? How big is a 13 inch circle?
ft
in
Area of a 13″ diameter circle
132.73square inches
0.92175square feet
0.10242square yards
856.34square centimeters
0.085634square 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
13.0 in 132.7 0.9218 856.3
13.1 in 134.8 0.9360 869.6
13.2 in 136.8 0.9503 882.9
13.3 in 138.9 0.9648 896.3
13.4 in 141.0 0.9793 909.8
Diameter in2 ft2 cm2
13.5 in 143.1 0.9940 923.5
13.6 in 145.3 1.009 937.2
13.7 in 147.4 1.024 951.0
13.8 in 149.6 1.039 965.0
13.9 in 151.7 1.054 979.0