Calmus or CALMUS may refer to:
Calmus, Saeul, Luxembourg Călmuș River, tributary of the river Tazlăul Sărat in Romania Dick Calmus (born 1944), American baseball player Rocky Calmus (born 1979), American footballer CALMUS, composing software created by Icelandic composer Kjartan Ólafsson Calmus, Leipzig vocal quintet founded by Martin Lattke 1999 See also Calamus (disambiguation)