There are other factors, which come into play, when one talks about the calories burned. The weight of the person practicing the yoga form is one of the most important factor. For example, for a person weighing 180 pounds, the number of calories burned can be in the range of 1000 calories. For a person weighing anywhere around, 120 to 160 pounds, about 350 to 700 calories will be burned after hot yoga exercises practiced for an hour.