# Area of a 155 Centimeter Circle

What is the area of a circle with a DIAMETER of 155 cm (radius of 77.5 cm)? How big is a 155 centimeter circle?
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Area of a 155cm diameter circle
 18,869 square centimeters 1.8869 square meters 2,924.7 square inches 20.311 square feet 2.2567 square 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.

Circle Area by Diameter
results may be rounded
Diameter cm2 in2 ft2
155.0 cm 18,870 2,925 20.31
155.1 cm 18,890 2,929 20.34
155.2 cm 18,920 2,932 20.36
155.3 cm 18,940 2,936 20.39
155.4 cm 18,970 2,940 20.42
155.5 cm 18,990 2,944 20.44
155.6 cm 19,020 2,947 20.47
155.7 cm 19,040 2,951 20.49
155.8 cm 19,060 2,955 20.52
155.9 cm 19,090 2,959 20.55