1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation calculates basal metabolic rate (BMR), which represents the number of calories your body needs at complete rest. It's considered one of the most accurate BMR formulas for healthy individuals.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Where:

• \( W \) — Weight in kilograms
• \( H \) — Height in centimeters
• \( A \) — Age in years
• \( S \) — Sex adjustment (+5 for men, -161 for women)

Explanation: The equation accounts for the fact that metabolism slows with age and differs between genders, with men typically having higher BMR than women at the same weight.

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine daily caloric needs for weight maintenance, loss, or gain. It's the foundation for all nutrition planning.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, and select gender. For accurate results, measure weight and height in the morning before eating.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Mifflin-St Jeor equation?
A: It's about 90% accurate for healthy individuals but may be less accurate for very muscular or obese individuals.

Q2: What's the difference between BMR and TDEE?
A: BMR is calories burned at rest; TDEE (Total Daily Energy Expenditure) includes activity and is typically 1.2-2.5× BMR.

Q3: Why do men and women have different equations?
A: Men generally have more muscle mass and less body fat than women at the same weight, leading to higher metabolic rates.

Q4: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (5+ kg) or annually as you age.

Q5: Can this be used for weight loss planning?
A: Yes, but for weight loss, subtract 250-500 kcal from your TDEE (not BMR) for safe, sustainable loss.