Soviet overall casualties are estimated around 26-27 million. 8.4 million soviet soldiers were KIA, another 3 million died as POW. Germany lost 2.7 million soldiers KIA and another 1.1 million died as POW. Millions of soviet civilian deaths resulted from combat, scorched earth strategies from both sides, partisan activities, retaliation of both sides, war crimes, diseases, starvation, etc. If you compare the ratio of KIAs : 8.4 / 2.7 = 3,1 and consider soviet forces reaching superiority in number and material in end of 1942, beginning of 1943 (Stalingrad), soviet casualties were high until May 1945. In 1944 the soviets used 10 times the number of air planes, tanks, artillery pieces, etc. compared to german troops and still sufferes high casualties. Stalin forced his troops to be fast to "liberate" as much as possible of eastern europe. German losses in 1944/45 were also much higher than in the beginning of the campaign, but KIA numbers were still lower than soviet casualties. (More german POWs.) Edit : removed the "37 million" since it is not an official number but was only noted on a russian news site.