Area of a 1 Inch Circle

What is the area of a circle with a DIAMETER of 1 inches (radius of 0.5 inches)? How big is a 1 inch circle?
ft
in
Area of a 1″ diameter circle
0.78540square inches
0.0054542square feet
0.00060602square yards
5.0671square centimeters
0.00050671square 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
1.0 in 0.7854 0.005454 5.067
1.1 in 0.9503 0.006600 6.131
1.2 in 1.131 0.007854 7.297
1.3 in 1.327 0.009218 8.563
1.4 in 1.539 0.01069 9.931
Diameter in2 ft2 cm2
1.5 in 1.767 0.01227 11.40
1.6 in 2.011 0.01396 12.97
1.7 in 2.270 0.01576 14.64
1.8 in 2.545 0.01767 16.42
1.9 in 2.835 0.01969 18.29