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BMR Calculator

Automatically calculate Basal Metabolic Rate (BMR) from gender, age, height, and weight. Useful for diet, health management, and nutrition planning reference.

years
cm
kg

Calculation Result

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Formulas

Harris-Benedict Equation (Revised)

Male: BMR = 88.362 + (13.397 × weight kg) + (4.799 × height cm) - (5.677 × age)

Female: BMR = 447.593 + (9.247 × weight kg) + (3.098 × height cm) - (4.330 × age)

This formula is the most widely used standard method.

How to Use

  • Select gender, enter age, height, and weight, then press 'Calculate BMR' button for automatic calculation.
  • The result shows daily basal metabolic rate (kcal) and the formula used.
  • Use as reference for diet, health management, and nutrition planning.

Important Notes

  • BMR is the minimum energy expenditure required for vital functions at rest (e.g., during sleep).
  • Actual daily calorie expenditure is higher than this value depending on activity level.
  • Individual factors like muscle mass, body fat percentage, body temperature, and hormonal balance are not considered.
  • May not apply to pregnant/nursing women, growing children, or those recovering from illness.
  • This tool is for health management reference and does not replace medical diagnosis or nutritional guidance.

Tips & FAQ

  • What is Basal Metabolic Rate (BMR)?
    The minimum energy consumption required for vital functions. It refers to calories consumed even at rest for heart function, breathing, body temperature maintenance, etc.
  • Difference between BMR and total daily energy expenditure?
    BMR is energy consumption at rest, total daily expenditure is total consumption including daily activities. Total expenditure = BMR × activity factor.
  • How to increase BMR?
    Effective methods include muscle building through strength training, moderate aerobic exercise, adequate sleep, balanced diet, and proper hydration.
  • How to use BMR for dieting?
    Calorie intake below BMR is dangerous. Plan appropriate calorie intake and exercise based on BMR as a reference.
  • Does BMR change with age?
    Yes. Generally peaks around age 10 and declines with age. Muscle mass reduction is considered the main cause.
This information is general guidance. Consult doctors, nutritionists, or medical institutions for detailed advice.