Sphere Formulas

1. Surface Area of a Sphere

Surface Area = 4 π r 2

Total surface area of the sphere.

Volume = \frac{4 π r 3}{3}

Space enclosed by the sphere.

Surface Area = 3 π r 2

Curved surface plus base area.

Volume = \frac{2 π r 3}{3}

Half the sphere’s volume.

Curved Surface Area = 2 π r 2

Excludes the flat base area.