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 complete rest. When multiplied by an activity factor, it provides your Total Daily Energy Expenditure (TDEE).

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
• \( activity\ factor \) — Multiplier based on physical activity level

Note: For males, the equation uses +5 instead of -161 at the end.

3. Importance of TDEE Calculation

Details: Knowing your TDEE is essential for weight management. It helps determine how many calories you need to maintain, lose, or gain weight based on your goals.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select your gender and activity level. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR equations for the general population, with an accuracy of about ±10%.

Q2: What's the difference between BMR and TDEE?
A: BMR is the calories your body needs at complete rest, while TDEE includes all daily activities and exercise.

Q3: How often should I recalculate my TDEE?
A: You should recalculate whenever your weight changes significantly (5+ kg) or your activity level changes substantially.

Q4: Are there limitations to this equation?
A: It may be less accurate for extremely muscular individuals, the elderly, or those with certain medical conditions affecting metabolism.

Q5: Should I use this for weight loss planning?
A: Yes, but remember it's an estimate. Monitor your progress and adjust your calorie intake based on actual results.