โ๏ธElectron Configuration Calculator
Full and noble-gas shorthand electron configuration for any element or ion.
Free Electron Configuration Calculator
Need an element's electron configuration without working through the Aufbau diagram by hand? Our free electron configuration calculator generates it instantly for any of the 118 elements โ or for a common ion, given its charge โ in both full and noble-gas shorthand notation.
It correctly applies known exceptions like chromium and copper, where the actual configuration differs from the naive filling order to favor a more stable half-filled or filled subshell, and explains why whenever one applies. An orbital box diagram shows how electrons fill the valence subshells according to Hund's rule, and the valence electron count is called out separately.
Built for chemistry coursework and quick lookups, it runs entirely in your browser. No sign-up, no downloads, no limits.