Area of a 30 Centimeter Circle

What is the area of a circle with a DIAMETER of 30 cm (radius of 15 cm)? How big is a 30 centimeter circle?
cm
Area of a 30cm diameter circle
706.86square centimeters
0.070686square meters
109.56square inches
0.76086square feet
0.084540square yards
(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 cm2 in2 ft2
30.0 cm 706.9 109.6 0.7609
30.1 cm 711.6 110.3 0.7659
30.2 cm 716.3 111.0 0.7710
30.3 cm 721.1 111.8 0.7761
30.4 cm 725.8 112.5 0.7813
Diameter cm2 in2 ft2
30.5 cm 730.6 113.2 0.7864
30.6 cm 735.4 114.0 0.7916
30.7 cm 740.2 114.7 0.7968
30.8 cm 745.1 115.5 0.8020
30.9 cm 749.9 116.2 0.8072