Your Basal Metabolic Rate (BMR) is the amount of energy your body burns each day to maintain vital functions. A number of factor such as your gender, weight, height and age affect this.  Why does this matter? Well, knowing your BMR will go a long way to helping you achieve your weight loss goals. You’ll then be able to calculate how many calories you need to eat to gain muscle, lose fat, or maintain your weight. Please input your details below.