Born in Tarnopol (now in the Ukraine), Charlotte Demant studied piano in Czernowitz, Bukovina (now in the Ukraine), and vocal studies in Vienna, from 1914. In Vienna, she also studied theory of musical forms, with Anton Webern, and piano with Eduard Steuermann. Demant worked as a concert singer, and music instructor. She left for USSR in 1936 and in 1938 moved to Prague, Czechoslovakia. A year later she settled in Manchester, England, where Demant was conductor of a women’s choir. She returned to Vienna after WWII (1946) and was a music instructor at the Wiener Konservatorium. She married the composer Hans Eisler, and their son was the famous painter Georg Eisler.