Question: 1 beer contains how many calories?
Answer: Leininger says beer generally has about 150 calories, whereas light beer calories range from 50 to 100 calories for a 12-ounce serving. (By the way, one pint is 16 ounces.) “Calories in beer come from two components – alcohol and carbohydrates (starches and sugar from unfermented grain),” Leininger says.