BMR Calculator - Basal Metabolic Rate
Calculate your basal metabolic rate using multiple validated scientific formulas including Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, and more.
Sample Examples
🏃 Young Male Athlete
25-year-old athletic male with low body fat seeking metabolic optimization
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👩 Middle-Aged Woman
45-year-old woman with moderate activity seeking weight management
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👴 Active Senior
65-year-old male focused on maintaining healthy metabolism
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💪 Bodybuilder
30-year-old competitive bodybuilder with high muscle mass
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👩🦳 Post-Menopausal Woman
55-year-old woman experiencing metabolic changes
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⚠️For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
What is Basal Metabolic Rate (BMR)?
Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest to maintain vital functions like breathing, circulation, cell production, and nutrient processing. It represents 60-75% of your total daily energy expenditure and is the foundation for calculating your caloric needs.
Energy at Rest
BMR measures calories burned for basic life-sustaining functions without any physical activity.
60-75% of TDEE
BMR accounts for the largest portion of daily calorie expenditure for most people.
Key Factors
Age, gender, weight, height, body composition, and genetics all influence your BMR.
BMR Calculation Formulas
Mifflin-St Jeor (Recommended)
Women: (10 × weight kg) + (6.25 × height cm) - (5 × age) - 161
Katch-McArdle
Best for those who know their body fat percentage