Cube Surface Area Calculator
SA = 6s². Six identical square faces.
Result
Surface area
150.0000
6 × 5² = 150.0000.
- Edge5
- Face area25.000000
- Surface area150.000000
- Volume125.000000
- SA / V ratio1.200000
Step-by-step
- Face area = s² = 5² = 25.0000.
- SA = 6 × face area = 6 × 25.0000 = 150.0000.
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
A cube has 6 squares meeting at right angles — 4 lateral + 1 top + 1 bottom.
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V = s³. Six equal square faces.
Rectangular Prism Volume
V = l × w × h. Box / cuboid volume.