Basal Metabolic Rate Calculator Mifflin St Jeor

Mifflin-St Jeor Equation:

\[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \]

Basal Metabolic Rate (BMR):

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1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula for estimating basal metabolic rate (BMR), which represents the number of calories your body needs at rest to maintain basic physiological functions.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

\[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years

Explanation: This equation provides an estimate of the calories your body burns at complete rest to maintain vital functions like breathing, circulation, and cell production.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for creating effective weight management plans, determining daily caloric needs, and establishing appropriate nutrition strategies for health and fitness goals.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, and age in years. All values must be valid positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and RMR?
A: BMR (Basal Metabolic Rate) measures energy expenditure at complete rest, while RMR (Resting Metabolic Rate) includes minimal activity. BMR is typically slightly lower than RMR.

Q2: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR equations for healthy adults, with an accuracy of about ±10% for most populations.

Q3: Does this equation work for everyone?
A: While accurate for most adults, it may be less precise for athletes, elderly individuals, or those with significantly different body compositions.

Q4: How often should I recalculate my BMR?
A: Recalculate whenever your weight changes significantly (5+ kg), or every 6-12 months as part of regular health assessment.

Q5: Can I use BMR for weight loss planning?
A: Yes, BMR forms the foundation for calculating Total Daily Energy Expenditure (TDEE), which helps determine appropriate calorie intake for weight loss or gain.