Area of a 4 Meter Circle

What is the area of a circle with a DIAMETER of 4 meters (radius of 2 meters)? How big is a 4 meter circle?
meters
Area of a 4m diameter circle
12.566square meters
125,664square centimeters
0.0012566hectares
19,478square inches
135.26square feet
15.029square yards
0.0031052acres
(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 m2 ft2
4.0 m 12.57 135.3
4.1 m 13.20 142.1
4.2 m 13.85 149.1
4.3 m 14.52 156.3
4.4 m 15.21 163.7
Diameter m2 ft2
4.5 m 15.90 171.2
4.6 m 16.62 178.9
4.7 m 17.35 186.7
4.8 m 18.10 194.8
4.9 m 18.86 203.0