Question: how many calories does a fat person have?
Answer: Summary. Past research has shown that there are roughly 3,500 calories in 1 lb of body fat. This has led many people to believe that if they want to lose 1 lb of body weight, they just need a reduction of 3,500 calories. For example, this would mean losing 500 calories each day to lose 1 lb of body fat in a week.