How It Works

Select a shape and enter the required dimensions. The calculator applies the appropriate surface area formula for that shape and returns the total surface area in square units.

Cube: SA = 6s². Sphere: SA = 4πr². Cylinder: SA = 2πr² + 2πrh.

Example

For example, a cube with a side length of 3 has a surface area of 54 square units. A sphere with a radius of 3 has a surface area of 36π square units. A cylinder with radius r and height h uses the formula 2πr² + 2πrh.

Frequently Asked Questions

Which shapes does this surface area calculator support?

This calculator supports cubes, spheres, and cylinders.

How do you calculate the surface area of a cube?

Multiply 6 by the square of the cube's side length. The formula is SA = 6s².

How do you calculate the surface area of a sphere?

Multiply 4π by the square of the sphere's radius. The formula is SA = 4πr².

How do you calculate the surface area of a cylinder?

Use SA = 2πr² + 2πrh, where r is the radius and h is the height.

What units are used for surface area?

Surface area is measured in square units, such as cm², m², in², or ft².

What is the difference between surface area and volume?

Surface area measures the total area covering the outside of a three-dimensional object and is expressed in square units. Volume measures the space inside the object and is expressed in cubic units.