Area of a 4 Inch Circle
What is the area of a circle with a DIAMETER of 4 inches (radius of 2 inches)? How big is a 4 inch circle?
Diameter
cm
Diameter
ft
in
Diameter
meters
Diameter
yards
Units
Area of a 4″ diameter circle
| 12.566 | square inches |
| 0.087266 | square feet |
| 0.0096963 | square yards |
| 81.073 | square centimeters |
| 0.0081073 | square 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.