How many calories are in one pound of body fat?

One pound of body fat is commonly accepted to contain approximately 3,500 calories. This figure is derived from estimates of the energy density of fat tissue and has become a standard reference point in nutrition and weight management literature. When individuals aim to lose weight, the principle is often that creating a calorie deficit—by consuming fewer calories than the body burns—can lead to fat loss. Thus, to lose one pound of body fat, a person would theoretically need to create a deficit of about 3,500 calories over a given period, whether through dietary changes, increased physical activity, or a combination of both.

Understanding this calorie value is crucial for setting realistic weight loss goals and managing expectations regarding the rate of weight loss. It is worth noting that variations in individual metabolism, body composition, and overall health can affect how fat loss occurs in practice, but 3,500 calories per pound serves as a foundational guideline in weight control strategies.