1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is considered the most accurate 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 energy requirements based on body size, age, and gender differences in metabolism.

3. Importance of RMR Calculation

Details: Knowing your RMR is essential for creating effective nutrition plans, whether for weight loss, maintenance, or muscle gain. It forms the foundation for determining your total daily energy expenditure.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, age in years, and select your gender. For accurate results, use precise measurements.

5. Frequently Asked Questions (FAQ)

Q1: Why is Mifflin-St Jeor considered the most accurate?
A: Multiple studies have shown it to be more accurate than other equations (like Harris-Benedict), with error rates typically within ±10% of measured RMR.

Q2: How does RMR differ from 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 slightly higher and more practical for everyday use.

Q3: What factors can affect RMR?
A: Muscle mass, age, gender, genetics, hormone levels, and body composition all influence your metabolic rate.

Q4: How often should I recalculate my RMR?
A: You should recalculate whenever your weight changes significantly (5+ kg) or annually as you age.

Q5: Can I increase my RMR?
A: Yes, through building muscle mass, proper nutrition, adequate sleep, and regular physical activity, especially strength training.