Basal Metabolic Rate (BMR) Calculator
Calculate your Basal Metabolic Rate using two formulas: Harris-Benedict and Mifflin-St Jeor. Compare results side by side.
How to Calculate Basal Metabolic Rate
- Enter your weight in kilograms, height in centimeters, and age in years.
- Select your gender (Male or Female).
- Click Calculate to see your BMR from both the Harris-Benedict and Mifflin-St Jeor formulas.
- Use the average of the two values as your most reliable BMR estimate for planning calorie intake.
Referência Rápida
| De | Para |
|---|---|
| Sedentary | ~1,800–2,000 kcal/day |
| Moderate activity | ~2,200–2,400 kcal/day |
| High activity | ~2,600–3,000 kcal/day |
| Protein | 0.8–1.2 g/kg body weight |
| Carbohydrates | 45–65% of calories |
| Fats | 20–35% of calories |
Casos de Uso
- •Establishing the calorie floor — the minimum daily intake — before building a weight management plan.
- •Comparing BMR values across different age periods to understand how metabolism slows with age.
- •Providing a clinical baseline for a dietitian assessing a patient's nutritional requirements.
Fórmula
Harris-Benedict: Male = 88.362 + 13.397×weight + 4.799×height − 5.677×age; Female = 447.593 + 9.247×weight + 3.098×height − 4.330×age. Mifflin: Male = 10×weight + 6.25×height − 5×age + 5; Female = 10×weight + 6.25×height − 5×age − 161.
Perguntas Frequentes
What is the difference between Harris-Benedict and Mifflin-St Jeor?
The Harris-Benedict equation was created in 1919 and revised in 1984. The Mifflin-St Jeor equation (1990) is considered more accurate for modern populations.
Why should I know my BMR?
BMR shows the minimum calories needed to sustain basic life functions. It serves as the foundation for calculating your daily calorie needs.
Why do the two formulas give different results?
The formulas are based on different studies and models. The difference is usually 5–10%. For best accuracy, use the average of both values.