The German bass, Hans Krämer, sang in a choir at age 15, but was a sculptor. Since 1929, he began his singing studies with Walter Lorenz Diez a.d. Lahn.
Since 1932, Hans Krämer worked as a concert and radio singer. After further training with Otto Iro he started 1935 his stage career at the Theater of Hanau, where he made his debut as Ferrando in Il Trovatore by Verdi. In 1938-1940, he sang at the Stadttheater von Beuthen (Bytom), in 1940-1944 at the Stadttheater of Stettin. He was then convened as a soldier and in 1945 became a prisoner of war, which lasted until 1948. A guest performance at the Opernhaus of Leipzig in 1949 led to a permanent engagement at this house, where he had a long career. Until 1976 he was at the Opernhaus of Leipzig, where he encountered a total of 2000 performances and was very popular. He also appeared in Berlin and Dresden, in Moscow and Paris, in Belgrade and Ljubljana. As a concert singer, he appeared, among other things, in West Germany. Since 1960, he worked as a teacher at the Musikhochschule of Leipzig.
Hans Krämer's extensive stage repertoire included: Rocco in Fidelio, Sarastro in Zauberflöte, Daland in Fliegenden Holländer, Landgraf in Tannhäuser, König Heinrich in Lohengrin, Marke in Tristan, Pogner in Meistersingern, King Philipp in Don Carlos by Verdi, the title role in Falstaff, Ivan Susanin in the opera Ein Leben für den Zaren by Glinka and Ochs in Rosenkavalier.
Recordings on the labels Eterna, and Amiga (selections from Waffenschmied and Bettelstudent).