World War II casualties vary significantly in different sources, but estimates suggest that the total number of casualties ranges from 50 million to 80 million people. From these, up to 25 million were military casualties.
Casualty statistics from different countries are notoriously unreliable, according to the Oxford Companion of Word War II. It is believed that up to 9 million people died in Germany, up to 28 million in the Soviet Union, up to 20 million in China, and up to 6 million in Poland. These were the countries with the largest number of casualties. The United States lost approximately 420,000 people, whereas the United Kingdom lost about 450,000 people.