Area of a 45 Centimeter Circle

What is the area of a circle with a DIAMETER of 45 cm (radius of 22.5 cm)? How big is a 45 centimeter circle?
cm
Area of a 45cm diameter circle
1,590.4square centimeters
0.15904square meters
246.52square inches
1.7119square feet
0.19021square 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
45.0 cm 1,590 246.5 1.712
45.1 cm 1,598 247.6 1.720
45.2 cm 1,605 248.7 1.727
45.3 cm 1,612 249.8 1.735
45.4 cm 1,619 250.9 1.742
Diameter cm2 in2 ft2
45.5 cm 1,626 252.0 1.750
45.6 cm 1,633 253.1 1.758
45.7 cm 1,640 254.2 1.766
45.8 cm 1,647 255.4 1.773
45.9 cm 1,655 256.5 1.781