Calorie Deficit Calculator

This calculator will determine the estimated total number of calories you need to maintain your current weight based on your BMR (Basal Metabolic Rate) and your level of activity. It will also give you the estimated number of calories you should be eating in a day to lose fat (calorie deficit).

Important: This calculator will underestimate caloric needs for the extremely muscular and will overestimate caloric needs for the extremely overweight. Please consult your doctor if you have any questions.

Important: This calculator will not allow calorie deficits below 1200 for women and 1800 for men.