A computational database of 6155 ternary-phase spinel oxides was first created from 52 transition, post-transition, alkaline, alkaline earth and lanthanide metal elements. For each combination of metal elements, three different ratios of metals were explored: A0.5B2.5O4, AB2O4 and A1.5B1.5O4. Both normal and inverse spinels of each permutation of materials were also considered, leading to six different spinel structures: (A0.5B0.5)Td(B2)OhO4, (B)Td(A0.5B1.5)OhO4, (A)Td(B2)OhO4, (B)Td(AB)OhO4, (A)Td(A0.5B1.5)OhO4 and (B)Td(B0.5A1.5)OhO4. The spinel oxide Fe3O4 belonging to the Fd3m spacegroup was used as a prototype structure for every single combination of elements except those utilizing Mn; for spinel oxides containing Mn in the octahedral positions, Mn3O4 was used as a prototype structure instead in order to account for the Jahn-Teller distortion of octahedrally coordinated Mn 3+ ions . DFT calculations were subsequently performed to relax the structure of each compound and obtain its ground state energy.