» Surface Area of a Cube Calculator


Calculate cube surface area from edge length, face diagonal or space diagonal, and reverse the formula to find a missing cube measure.

This surface area of a cube calculator helps you find the total surface area of a cube from the edge length, face diagonal, or space diagonal. It is useful for geometry homework, quick checks, and technical measurements.

The calculator is also handy when you want to compare the different ways of defining a cube and quickly convert a known edge or diagonal into total surface area.


Surface area of a cube formulas

$$A= 6a^{2}$$




Area Calculator FAQ

How do you calculate the surface area of a cube?
To find the surface area of a cube, you normally start with the edge length. This calculator can also use the face diagonal or the space diagonal and convert them into total surface area.

What is the difference between edge, face diagonal, and space diagonal?
The edge is the side length of the cube. The face diagonal runs across one square face, while the space diagonal runs through the cube between two opposite corners.

Can I calculate cube surface area from the face diagonal?
Yes. If you know the face diagonal, the calculator first finds the edge length and then calculates the full surface area of the cube.

What is a cube surface area calculator useful for?
It is useful for geometry, schoolwork, box and model measurements, and any situation where you need the outer area of a cube-shaped object.


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