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Circle / Sphere Calculator

Circumference:
Circle Area: (units²)
Sphere Surface Area: (units²)
Sphere Volume: (units³)
Enter Radius:

Enter the radius of a circle or sphere, and the calculator will return the area, circumference, sphere surface area, and volume. If you're entering the radius of a sphere, the Circle Area would be the cross section of the sphere. If you're entering the radius of a circle, ignore the sphere surface area and the volume.

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