1. What Is The Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula for estimating Resting Metabolic Rate (RMR), which represents the number of calories your body burns at rest to maintain basic physiological functions.

2. How Does The Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Where:

• \( Weight \) — Body weight in kilograms (kg)
• \( Height \) — Height in centimeters (cm)
• \( Age \) — Age in years
• +5 — Constant for men
• -161 — Constant for women

Explanation: The equation accounts for the basic metabolic needs based on body size, age, and gender differences in metabolic rate.

3. Importance Of RMR Calculation

Details: Knowing your RMR is essential for creating effective nutrition plans, weight management strategies, and understanding your body's basic energy requirements.

4. Using The Calculator

Tips: Enter weight in kg, height in cm, age in years, and select gender. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between RMR and BMR?
A: RMR (Resting Metabolic Rate) and BMR (Basal Metabolic Rate) are often used interchangeably, but BMR is measured under more strict conditions while RMR is a more practical measurement.

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

Q3: When should I measure my weight for this calculation?
A: For best results, measure your weight in the morning after using the bathroom and before eating or drinking.

Q4: Are there limitations to this equation?
A: The equation may be less accurate for very muscular individuals, those with high body fat percentages, elderly populations, and athletes.

Q5: How often should I recalculate my RMR?
A: Recalculate whenever your weight changes significantly (5+ kg) or every 6-12 months as part of regular health assessment.