Wolfram|Alpha has stellation volume calculators. Solve volume problems related to first cuboctahedron, dodecahedron, icosidodecahedron or rhombic dodecahedron stellations; second dodecahedron or rhombic dodecahedron stellations; third dodecahedron stellations; echidnahedra; great rhombic triacontahedra; third icosahedron stellations; eleventh icosahedron stellations; third rhombic dodecahedron stellations; rhombic hexecontahedra; small triambic icosahedra; and stellated octahedra.
