After obtaining the compounds that have an overall valence of +1, an energy above convex hull not greater than 0 eV and no radioactive elements we simulate the material with density functional theory (DFT). Further analysis using the Bader charge method (described in the Methods section) identifies 51 candidates, which include 4 compounds that have been confirmed as electrides previously in experiment (𝐶𝑎 2 𝑁, 𝑆𝑟 2 𝑁, 𝐵𝑎 2 𝑁,and 𝐶𝑎 12 𝐴𝑙 14 𝑂 32 ) and one previously predicted to be an electride (𝐶𝑠 3 𝑂). It is of course unsurprising to find many of the archetypal candidates with the +1 valence design principle, since it was derived mainly from these well-known examples, but their presence does lend confidence to the ab initio screening approach. The full list of the 51 electride candidates, their structure and partial charge density can be found in the Supporting Information.