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Basal Metabolic Rate (BMR) represents the number of calories your body needs to maintain basic physiological functions at rest. Our free BMR calculator uses scientifically validated formulas to calculate your daily calorie requirements, helping you understand your metabolism and make informed decisions about nutrition and fitness goals.
Enter your age, gender, weight, and height. Choose between Mifflin-St Jeor (more accurate) or Harris-Benedict formulas. Select your activity level to calculate Total Daily Energy Expenditure (TDEE). The calculator provides BMR and calorie needs for different activity levels.
For weight loss, create a calorie deficit of 500 calories per day for 1 pound per week loss. For weight gain, maintain a surplus. Always combine with proper nutrition and exercise. Consult healthcare professionals for personalized advice.
BMR is influenced by age, gender, weight, height, and body composition. Muscle mass increases BMR, while fat mass decreases it. Age naturally reduces BMR as metabolism slows. Regular exercise and strength training can help maintain higher BMR.
Mifflin-St Jeor is generally more accurate for modern populations and is recommended for most users.
Recalculate when your weight changes significantly, or every 3-6 months as part of routine health monitoring.
Yes, BMR and RMR (Resting Metabolic Rate) are essentially the same and can be used interchangeably.
Yes, building muscle through strength training increases BMR. Cardio exercise also provides temporary metabolic boosts.