BMR Calculator (Mifflin St Jeor Equation)
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation, the formula most modern dietitians consider the most accurate.
What is BMR
Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest to maintain vital functions. It’s the foundation for estimating total daily calorie needs.
The Mifflin-St Jeor equation
This calculator uses the Mifflin-St Jeor equation, widely regarded by dietitians as more accurate for modern populations than older formulas. It calculates BMR from weight, height, age, and sex, then multiplies by an activity factor to estimate Total Daily Energy Expenditure (TDEE) — the calories needed to maintain your current weight given your activity level.
Individual metabolism varies, and this tool is for general planning and educational purposes only. It is not a substitute for personalized nutrition advice from a qualified healthcare professional or registered dietitian.