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# Calculate The Surface Area of A Sphere

Last updated: Saturday, April 29, 2023
Select a spherical shape below
Sphere
Hemisphere
Spherical Cap
Spherical Wedge
Spherical Zone

A sphere is a three-dimensional geometric object that is perfectly round and symmetrical in all directions. It is defined as the set of all points in space that are at an equal distance (the radius) from a central point.

Spheres are common shapes found in nature and in human-made objects. For example, many fruits such as apples, oranges, and grapefruits are shaped like spheres. Similarly, ball bearings, bubbles, and some types of lamps also have a spherical shape. In the field of astronomy, planets and stars are often modeled as spheres. The unique properties of a sphere make it an essential shape in fields such as physics, engineering, and architecture.

Calculate the surface area of a sphere effortlessly with our free online calculator. Simply input the necessary measurements and let our calculator do the work for you. With our step-by-step process, calculating the surface area of a sphere has never been easier. Don't waste time struggling with manual calculations, use our efficient tool to get the job done in seconds.

The formula for determining the surface area of a sphere is defined as:
$$SA$$ $$=$$ $$4$$ $$\cdot$$ $$\pi$$ $$\cdot$$ $$r^2$$
$$SA$$: the surface area of the sphere
$$r$$: the radius of the sphere
$$\pi$$: A mathematical constant with an infinite decimal tail
The SI unit of surface area is: $$square \text{ } meter\text{ }(m^2)$$

## Find $$SA$$

Use this calculator to determine the surface area of a sphere when the length of its radius is given.
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$$r$$
$$meter$$
$$\pi$$ : A mathematical constant with an infinite decimal tail