1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is considered one of the most accurate formulas for calculating Basal Metabolic Rate (BMR), which represents the number of calories your body needs at rest. When combined with activity level, it provides an accurate estimate of daily calorie needs.

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
• \( s \) — +5 for males, -161 for females
• \( activity\_factor \) — Multiplier based on activity level

Activity Factors:

• 1.2 - Sedentary (little or no exercise)
• 1.375 - Lightly active (light exercise 1-3 days/week)
• 1.55 - Moderately active (moderate exercise 3-5 days/week)
• 1.725 - Very active (hard exercise 6-7 days/week)
• 1.9 - Extra active (very hard exercise, physical job)

3. Importance of Calorie Calculation

Details: Accurate calorie estimation is crucial for weight management, whether your goal is weight loss, maintenance, or gain. Understanding your daily calorie needs helps create effective nutrition plans and achieve health goals.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, age in years, select gender and activity level. Be honest about your activity level for the most accurate results.

5. Frequently Asked Questions (FAQ)

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

Q2: How accurate is this calculator?
A: While highly accurate for most people, individual variations in metabolism may affect results. It's a good starting point that may need adjustment based on results.

Q3: Should I use this for weight loss?
A: Yes, subtract 500 calories from the result for approximately 0.5kg weight loss per week, or add 500 calories for weight gain.

Q4: How often should I recalculate?
A: Recalculate every 3-6 months or if your weight, activity level, or age changes significantly.

Q5: Are there limitations to this equation?
A: May be less accurate for athletes with very high muscle mass, elderly individuals, or those with certain medical conditions affecting metabolism.