1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a formula used to calculate basal metabolic rate (BMR), which represents the number of calories your body needs at rest to maintain basic physiological functions. It's considered one of the most accurate BMR formulas available.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( activity multiplier \) — Factor based on physical activity level

Explanation: The equation calculates your basal metabolic rate, then multiplies it by your activity level to determine total daily energy expenditure.

3. Importance of Calorie Calculation

Details: Accurate calorie calculation is essential for weight management, whether your goal is weight loss, maintenance, or gain. Understanding your TDEE helps create effective nutrition plans.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select your gender, and choose your activity level. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of other formulas?
A: The Mifflin-St Jeor equation is considered more accurate than older formulas like Harris-Benedict, especially for obese individuals.

Q2: What is the difference between BMR and TDEE?
A: BMR is calories burned at complete rest, while TDEE includes all daily activities and represents total calories burned in a day.

Q3: How accurate are these calculations?
A: While highly accurate for most people, individual variations in metabolism can cause results to vary by ±10-15%.

Q4: Should I use this for weight loss?
A: Yes, subtracting 500 calories from your TDEE typically results in about 0.5kg weight loss per week.

Q5: How often should I recalculate my calories?
A: Recalculate every 4-6 weeks or after significant weight changes (±5kg) or activity level changes.