🧮 How to Calculate (Step-by-Step Formula)

1. Collect your biometric metrics: weight (W in kg), height (H in cm), and age (A in years).
2. For Men, apply the clinical Mifflin-St Jeor formula: BMR = (10 × W) + (6.25 × H) - (5 × A) + 5.
3. For Women, apply: BMR = (10 × W) + (6.25 × H) - (5 × A) - 161.
4. The resulting value is the number of calories you burn daily at absolute rest.

Key Concepts & Terminology Decoded

• Resting Energy Expenditure: BMR accounts for roughly 60% to 75% of your daily calorie burn, proving that breathing and staying alive consumes most of our energy.
• Harris-Benedict & Mifflin-St Jeor: Clinical equations that estimate BMR based on biometric inputs (age, weight, height, and biological sex).
• Metabolic Variables: Muscle tissue is metabolically active, meaning increasing lean muscle mass naturally raises your BMR.