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Mayo Clinic states that it takes approximately 3500 calories to burn one pound of fat. In order to lose weight, a person must burn 3500 calories per each pound of fat they wish to lose.


According to the Mayo Clinic, 3,500 calories are equal to about 1 pound. Because calories are a unit of heat and pounds are a unit of weight, there is no direct conversion, and calories per pound differ with each person.


Three thousand five hundred calories must be burned, either through exercise or daily life functions, to lose a pound. To lose a pound a week, an additional 500 calories per day must be burned. A healthy, safe weight loss is between 1 and 2 pounds per week.


One pound of body fat is equal to about 3,500 calories. In general, if someone consumes 500 calories less per day, he loses about 1 pound in a week.


One pound of fat is equivalent to approximately 3,500 calories, meaning a person needs to burn 3,500 more calories than he consumes to lose 1 pound of body fat. By cutting approximately 500 calories per day, with diet or exercise, a person loses roughly 1 pound of fat p...


According to the Mayo Clinic, 70,000 calories of fat equal 20 pounds, as each pound is equivalent to 3,500 calories. However, it is unlikely this amount of weight loss would be purely fat, as water and even muscle are often lost during significant weight loss.


The amount of calories a person burns naturally in a day depends on factors such as gender, height, current weight and age, according to SFGate. The process of naturally burning calories without added activity is called basal metabolic rate, or BMR.