Work out octahedron volume instantly with clear inputs, formula shown and shareable results.
A regular octahedron is two square pyramids glued base to base. Its volume is (√2/3)a³ and its eight equilateral faces total 2√3·a².
Volume
V = (√2/3)a³
Surface area
S = 2√3·a²
Circumradius
R = a√2 / 2
Eight faces, twelve edges and six vertices: 6 − 12 + 8 = 2.
The cube. Octahedron and cube are dual Platonic solids.