Work out cube volume and surface area instantly with clear inputs, formula shown and shareable results.
A cube of edge a has volume a³, six identical square faces giving surface area 6a², and a space diagonal a√3 running corner to opposite corner.
Volume
V = a³
Surface area
S = 6a²
Space diagonal
d = a√3
4³ = 64 cubic units, with surface area 6 × 16 = 96 square units.
Apply Pythagoras twice: the face diagonal is a√2, then combine with the third edge to get √(2a² + a²) = a√3.