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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Each year 1.5 million shelter animals are euthanized (670,000 dogs and 860,000 cats). Source: ASPCA. The solution is not to shelter unwanted pets, but to SHUT DOWN THE PET MILLS. Anyone who wants a pet will just have to adapt a great pet from a shelter.

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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