"Overall, by genocide, the killing of hostages, reprisal raids, forced labor, 'euthanasia,' starvation, exposure, medical experiments, terror bombing, and in the concentration and death camps, the Nazis murdered from about 15,000,000 to over 31,600,000 people, most likely closer to 21 million men, women, handicapped, aged, sick, prisoners of war, forced laborers, camp inmates, critics, homosexuals, Jews, Slavs, Serbs, Czechs, Italians, Poles, Frenchmen, Ukrainians, and so on. Among them were 1 million children under eighteen years of age."
-R.J. Rummel, Death by Government
Go to http://www.freedomsnest.com/rummel_nazi.html to see how he calculated the numbers. The big difference between your numbers and his is how many of the 12 million Russian civilian dead during WWII do you blame Hitler, and how many do you blame on Stalin.