Your Basal Metabolic Rate (BMR) represents the absolute minimum amount of energy (calories) your body requires to maintain fundamental, life-sustaining functions while at complete rest. This includes vital processes such as breathing, blood circulation, cellular repair, and neurological function. Understanding your BMR is the most critical physiological baseline required for structuring any diet, as it accounts for 60% to 75% of your total daily calorie expenditure.
The Mifflin-St Jeor Equation
Men: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5Women: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161
Widely considered by clinical dietitians as the most accurate modern predictive equation.
How to Use This Calculator
- Enter your biological sex (metabolic rates differ intrinsically between men and women).
- Input your current age in years.
- Provide your precise weight and height.
- Click Calculate to reveal your baseline resting caloric needs.
Frequently Asked Questions (FAQ)
What is the difference between BMR and TDEE?
BMR is the energy your body burns if you stayed in bed all day without moving or digesting food. TDEE (Total Daily Energy Expenditure) is your BMR *plus* the calories burned through daily activities, exercise, and the thermic effect of digesting food. You use TDEE, not BMR, to set your daily diet goals.
Can I increase my Basal Metabolic Rate?
Yes. Because skeletal muscle tissue is highly metabolically active compared to adipose (fat) tissue, building lean muscle mass through resistance training will permanently raise your BMR, allowing you to burn more calories continuously, even while sleeping.