Cube Calculator
Calculate volume, surface area, and diagonals from a side length.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Request a ToolHow to Use the Cube Calculator
This calculator computes all key measurements of a cube from a single side length.
- Enter the side length. Type a positive number.
- View the results. Volume, surface area, space diagonal, and face diagonal update automatically.
- Copy or share. Use the buttons to save or share your result.
About the Cube
A cube is a regular hexahedron with six identical square faces. Volume = s^3. Surface area = 6s^2. The space diagonal (corner to opposite corner) = s * sqrt(3). The face diagonal = s * sqrt(2). Cubes are fundamental shapes in geometry and appear throughout architecture, packaging, and crystallography.
Frequently Asked Questions
What is the formula for the volume of a cube?
Volume = side^3. Simply cube the side length to get the volume.
How do you find the diagonal of a cube?
The space diagonal (from one corner to the opposite corner through the interior) is side * sqrt(3). The face diagonal is side * sqrt(2).
What is the difference between a cube and a rectangular prism?
A cube has all sides equal. A rectangular prism can have three different side lengths.