1. What Is The Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula to estimate 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 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 needs.

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 slightly higher and more practical for everyday use.

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 about 90% accuracy in most populations.

Q3: Should I use this for weight loss planning?
A: Yes, knowing your RMR helps create appropriate calorie deficits for sustainable weight loss while maintaining essential bodily functions.

Q4: Are there factors that affect RMR accuracy?
A: Yes, factors like body composition, thyroid function, pregnancy, and certain medical conditions can affect actual metabolic rate.

Q5: How often should I recalculate my RMR?
A: Recalculate when you experience significant weight changes (±5 kg) or every 6-12 months as part of regular health assessment.