Area of a 8 Inch Circle

What is the area of a circle with a DIAMETER of 8 inches (radius of 4 inches)? How big is a 8 inch circle?
ft
in
Area of a 8″ diameter circle
50.265square inches
0.34907square feet
0.038785square yards
324.29square centimeters
0.032429square 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
8.0 in 50.27 0.3491 324.3
8.1 in 51.53 0.3578 332.5
8.2 in 52.81 0.3667 340.7
8.3 in 54.11 0.3757 349.1
8.4 in 55.42 0.3848 357.5
Diameter in2 ft2 cm2
8.5 in 56.75 0.3941 366.1
8.6 in 58.09 0.4034 374.8
8.7 in 59.45 0.4128 383.5
8.8 in 60.82 0.4224 392.4
8.9 in 62.21 0.4320 401.4