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# Calculate The Surface Area of A Hemisphere

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

A hemisphere is a three-dimensional shape that is half of a sphere. It has a circular flat base and a rounded top, with the height equal to the radius of the base. Hemispheres are commonly used in architecture, engineering, and design for their unique properties and aesthetic appeal.

Hemispheres are commonly found in various objects and structures, such as domes, planetariums, and even some types of light fixtures. One famous example is the Hemispherical Dome in the United States Capitol Building, which is made of cast iron and weighs over 4,000 pounds. The dome serves as a symbol of the American government and is often featured in images of Washington, D.C.

Easily calculate the surface area of a hemisphere with step-by-step guidance using our free calculator below.

The formula for determining the surface area of a hemisphere is defined as:
$$SA$$ $$=$$ $$3$$ $$\cdot$$ $$\pi$$ $$\cdot$$ $$r^2$$
$$SA$$: the surface area of the hemisphere
$$r$$: the radius of the hemisphere
$$\pi$$: 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 hemisphere when the length of its radius is given.
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$$r$$
$$meter$$
$$\pi$$ : A mathematical constant with an infinite decimal tail