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Cube Calculator
Enter the edge length — volume and surface update instantly.
Formula
V = a³ | S = 6a² | Diagonal = a√3
Example
a = 40 mm → V = 64 000 mm³ = 64 mL, S = 9600 mm², diagonal = 69.28 mm.
FAQ
What is a cubic meter?
A cube with 1 m edges holds 1000 liters — the SI unit of volume.
Why 6a² for surface?
A cube has 6 identical square faces, each of area a².