Enter your cube's side length and choose your preferred unit to calculate the volume, surface area, face diagonal, and space diagonal of a perfect cube. The Cube Calculator gives you all four key geometric properties at once — great for math homework, packaging, or engineering tasks.
Volume
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Surface Area
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Face Diagonal
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Space Diagonal
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Perimeter (all edges)
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The volume of a cube is calculated as V = a³, where 'a' is the length of one side. For example, a cube with a side length of 5 cm has a volume of 125 cm³.
A cube has 6 identical square faces, so the total surface area is SA = 6a², where 'a' is the side length. A cube with a 4 cm side has a surface area of 96 cm².
A face diagonal runs from one corner of a face to the opposite corner of the same face, calculated as a√2. A space diagonal passes through the interior of the cube from one corner to the opposite corner, calculated as a√3.
A cube has 6 faces, 12 edges, and 8 vertices. All faces are squares of equal size, and all edges are the same length — which is what makes it a perfect cube.
You can use millimeters, centimeters, meters, inches, or feet. The output units for volume will be the cubic version of your chosen unit (e.g., cm³), and area outputs will be in square units (e.g., cm²).
A cube is a special case of a rectangular box where all three dimensions — length, width, and height — are exactly equal. If any two dimensions differ, it becomes a cuboid rather than a cube.
The total perimeter of a cube (sum of all 12 edges) is calculated as P = 12a, where 'a' is the side length. This is useful when estimating materials needed to frame or edge a cube-shaped structure.
Yes. The volume result tells you the cubic capacity of a cube-shaped box, which is useful for estimating shipping volume. For irregular boxes, use a cuboid or rectangular prism calculator instead.