Elachista kalki is a moth of the Elachistidae family. It is found in Austria, Germany, Greece, Hungary, Italy, Kazakhstan and Russia (southern Urals, Volga region, Tuva Republic). The length of the forewings is 4.8–5.5 mm for males and 4.8–5.2 mm for females. The forewings are broad, unicolorous shiny white except the basal part of the costa which is narrowly dark grey. The hindwings are pale grey and translucent with a white fringe.