# Area and Volume of a Sphere

Instructions: Enter the radius $$r$$ of a sphere and the corresponding unit (cm, mt, ft, etc) and the solver will compute the area and volume showing all the steps.

Type the radius of the sphere $$r$$ =

More About the Sphere

In order to compute the area and the volume of a sphere of radius $$r$$ we use the following formulas:

$\text{Area} = 4\pi r^2$ $\text{Volume} = \frac{4}{3}\pi r^3$

Computationally speaking, it is really simple to compute the area and the volume of a sphere, by simply plugging the radius $$r$$ in the above formulas. For example, if the radius is $$r = 3$$, then we compute

$\text{Area} = 4\pi r^2 = 4\pi \cdot 3^2 = 36 \pi$ $\text{Volume} = \frac{4}{3}\pi r^3 = \frac{4}{3}\pi \cdot 3^3 = \frac{108}{3} \pi = 36 \pi$

which completes the calculation.

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