BMR Calculator
Calculate your Basal Metabolic Rate (BMR)—the calories your body burns at rest. Essential for understanding your baseline metabolism.
What is Basal Metabolic Rate?
Basal Metabolic Rate (BMR) represents the number of calories your body burns at rest, just to maintain basic physiological functions like breathing, circulation, and cell production. It accounts for 60-75% of your total daily energy expenditure. The Mifflin-St Jeor equation, developed through scientific research, accurately calculates BMR based on age, gender, weight, and height. Factors affecting BMR include genetics, muscle mass, hormones, and metabolism. Building muscle mass increases BMR since muscle tissue is more metabolically active than fat tissue. Understanding your BMR helps you set realistic calorie targets for weight management and fitness goals. Generally, BMR decreases with age, so you may need to adjust calorie intake as you get older.