BMR (Basal Metabolic Rate) Calculator
Calculate baseline calories burned at complete rest using the Mifflin-St Jeor formula.
How to Use BMR (Basal Metabolic Rate) Calculator
- Enter your body weight in kilograms (kg) and height in centimeters (cm).
- Enter your current age in completed years.
- Select your biological sex (Male or Female) to apply the clinical metabolic offset.
- Click 'Calculate BMR' to view your daily resting calorie burn and metabolic baseline.
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Frequently Asked Questions
What is Basal Metabolic Rate (BMR)?
Basal Metabolic Rate (BMR) is the minimum amount of daily caloric energy your body expends to sustain vital physiological functions at complete physical and digestive rest, including respiration, blood circulation, cellular synthesis, and core temperature maintenance.
What is the Mifflin-St Jeor equation used by this calculator?
The Mifflin-St Jeor formula is the clinically preferred standard for BMR estimation: For men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5. For women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161.
What is the difference between BMR and TDEE?
BMR is the baseline energy burned at complete bed rest without any physical activity or food digestion. Total Daily Energy Expenditure (TDEE) includes your BMR multiplied by your physical activity multiplier (1.2 to 1.9) plus the thermic effect of food.
Should I consume fewer calories than my calculated BMR?
Consuming below your BMR for extended periods is generally not advised without clinical supervision, as severe caloric restriction can trigger metabolic adaptation, lethargy, nutritional deficiencies, and lean muscle mass loss. Note that BMR formulas provide statistical estimates for healthy adults rather than individualized medical prescriptions.