1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is currently considered the most accurate BMR (Basal Metabolic Rate) formula for healthy individuals. It estimates the calories your body needs at complete rest.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Then calculates:

• TDEE = BMR × Activity Factor
• Weight Loss Calories = TDEE - Calorie Deficit

Explanation: The equation accounts for your body's basic energy needs, then adjusts for activity level and desired weight loss rate.

3. Importance of Accurate Calorie Calculation

Details: Knowing your exact calorie needs helps create effective weight loss plans without excessive restriction that could harm metabolism.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, select gender and activity level. A 500 kcal/day deficit typically leads to ~0.5kg/week weight loss.

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of Harris-Benedict?
A: Mifflin-St Jeor is more accurate for modern populations, especially for obese individuals.

Q2: What's a safe calorie deficit?
A: Generally 300-500 kcal/day for moderate weight loss, up to 1000 kcal/day for aggressive loss (under supervision).

Q3: How accurate is the activity factor?
A: It's an estimate. Wearable trackers can provide more personalized activity data.

Q4: Should I eat back exercise calories?
A: Only if using a very aggressive deficit or doing extreme exercise. Most people shouldn't.

Q5: How often should I recalculate?
A: Recalculate every 5-10kg of weight loss, as your BMR decreases with weight loss.