1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is currently considered the most accurate formula for calculating basal metabolic rate (BMR) and total daily energy expenditure (TDEE). It provides a more accurate assessment of calorie needs than older equations, especially for obese individuals.

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

Explanation: The equation calculates basal metabolic rate (BMR) first, then multiplies by an activity factor to estimate total daily calorie needs.

3. Importance of TDEE Calculation

Details: Knowing your TDEE is crucial for weight management - maintaining, losing, or gaining weight. It serves as the foundation for any nutrition plan.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, select gender and activity level. For accurate results, use morning measurements before eating.

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of Harris-Benedict?
A: Mifflin-St Jeor is more accurate, especially for modern populations and obese individuals, with an accuracy of about ±10%.

Q2: What are typical TDEE values?
A: Average TDEE ranges from 2000-3000 kcal/day for adults, but varies greatly based on size, age, gender and activity.

Q3: How often should I recalculate my TDEE?
A: Recalculate after significant weight changes (±5kg) or activity level changes. Otherwise, every 3-6 months.

Q4: Are there limitations to this equation?
A: Less accurate for extremely muscular individuals, pregnant women, and those with certain metabolic conditions.

Q5: Should I eat exactly my TDEE to maintain weight?
A: TDEE is an estimate. Monitor your weight over time and adjust intake by ±100-200 kcal as needed for your goals.