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) - the number of calories your body needs at complete rest. It's particularly useful for individuals with obesity as it provides a more accurate estimation than older formulas.

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
• \( s \) — Gender adjustment factor

Explanation: The equation calculates your basal metabolic rate, then multiplies it by your activity level to determine your Total Daily Energy Expenditure (TDEE). For weight loss, we subtract 500 calories to create a safe deficit.

3. Importance of Calorie Calculation for Weight Management

Details: Accurate calorie calculation is essential for effective weight management. Understanding your BMR and TDEE helps create appropriate calorie deficits for sustainable weight loss while ensuring you meet your body's basic nutritional needs.

4. Using the Calculator

Tips: Enter your current weight in kg, height in cm, age in years, select your gender and activity level. For accurate results, use your most recent measurements and be honest about your activity level.

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of other equations?
A: Research shows the Mifflin-St Jeor equation is more accurate, especially for individuals with obesity, with an accuracy rate of about 90% compared to measured energy expenditure.

Q2: Is a 500-calorie deficit safe for everyone?
A: For most people, a 500-calorie deficit is safe and results in about 0.5kg weight loss per week. However, individuals should not consume fewer than 1200 calories daily without medical supervision.

Q3: How often should I recalculate my calorie needs?
A: Recalculate every 4-6 weeks or after significant weight loss (more than 5kg) as your BMR decreases with weight loss.

Q4: Should I eat back exercise calories?
A: The activity multiplier already accounts for your regular exercise. Only consider eating back additional calories if you do unexpected, intense exercise beyond your normal routine.

Q5: What if I have a medical condition?
A: Consult with a healthcare provider or registered dietitian before making significant dietary changes, especially if you have diabetes, thyroid issues, or other medical conditions.