To cube the radius simply multiply it by itself. The Volume of a Sphere Formula With a list of complete Sphere Formulas this is easy to calculate the surface area curved surface area and the volume of the Sphere. The surface area formula for a sphere is 4 x p x diameter 22 where diameter 2 is the radius of the sphere d 2 x r so another way to write it is 4 x p x radius2.
Enter the diameter of a sphere.
This is the equation. Given the surface area of a. The answer to this formula will be in square units. A O r 2 displaystyle AOmega r 2 where O is the solid angle of the spherical sector in steradians the SI unit of solid angle.