What Is BMR?

Basal Metabolic Rate is the number of calories your body needs just to maintain basic functions like breathing and circulation while at complete rest. This calculator uses the Mifflin-St Jeor equation, which is considered one of the most accurate formulas available.

Using BMR to Plan Nutrition

Once you know your BMR, you can multiply it by an activity factor to estimate your total daily calorie needs, which is useful for setting weight loss, maintenance or muscle gain goals.