# Learn About the Volume of a Sphere

The volume of a sphere is the amount of space inside the sphere. The volume of a sphere is equal to 4/3 pi times the radius cubed, or V = 4/3 pi r3.

## Types of Spheres

There are three types of spheres:

- Regular Spheres: A regular sphere is a sphere with all sides and angles equal. It is the most symmetrical type of sphere.
- Ellipsoids: An ellipsoid is a sphere that is not perfectly round. It has two different axes of symmetry, meaning that it can be rotated around two different axes and still look the same.
- Spheroids: A spheroid is a sphere that is not perfectly round but has a more oval shape. It has one axis of symmetry, meaning that it can be rotated around one axis and still look the same.

### Definition of Sphere

## What is the Volume of a Sphere?

The formula gives the volume of a sphere:

Volume = 4/3 π r3

where r is the radius of the sphere.

## What is the Formula for the Volume of a Sphere?

The volume of a sphere is equal to 4/3*pi*r^3, where r is the sphere’s radius.

## Derivation of the Formula of the Sphere

The surface area of a sphere is equal to the product of the sphere’s radius and the square of the sphere’s radius.

### The Volume of a Sphere of Unknown Radius

The volume of a sphere is (4/3)πr3.