how many calories are in a pound of body fat
Losing 1 to 2 pounds a week is considered safe and effective, because losing weight at a faster rate can be harmful and harder to maintain. To lose 1 pound a week, you need to create a calorie deficit of 3,500 calories per week, or 500 calories a day. To burn 2 pounds of fat per week, you must create a weekly calorie deficit of 7,000 calories, or a daily deficit of 1,000 calories. Just as small amounts of excess calories add up, smaller calorie deficits can also have an impact over time.