Cube Surface Area Calculator
SA = 6s². Six identical square faces.
Result
How to use this calculator
- Enter edge length.
- Read surface area.
About this calculator
A cube has 6 identical square faces. Surface area = 6s². Doubling the edge increases SA by 4× (squared scaling) but volume by 8× (cubed). The SA-to-volume ratio is 6/s — small cubes (e.g. ice cubes) have much higher SA/V, which is why they melt faster than blocks.
Frequently asked
Why 6 faces?+
How does SA-to-V matter?+
Cube vs. cuboid SA?+
Painting a cube?+
Soap-bubble cube?+
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