Calculate your Basal Metabolic Rate - the number of calories your body needs at complete rest for basic functions like breathing and circulation.
Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest.
Knowing your BMR helps you understand your body's energy needs. It's the foundation for calculating your daily calorie requirements for weight maintenance, loss, or gain.
This calculator uses three formulas: Mifflin-St Jeor (most accurate for most people), Harris-Benedict (older but still used), and Katch-McArdle (requires body fat percentage).
BMR is influenced by age, gender, weight, height, body composition, and genetics. Muscle mass increases BMR, while fat tissue requires less energy to maintain.