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 rest to maintain basic physiological functions. It's considered one of the most accurate BMR equations for the general population.

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

Explanation: This equation calculates the minimum energy expenditure required to sustain vital functions while at complete rest.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for creating effective weight management plans, determining daily calorie needs, and understanding your body's basic energy requirements for maintaining or achieving a healthy weight.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, and age in years. All values must be valid positive numbers. For accurate results, use recent measurements.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and TDEE?
A: BMR (Basal Metabolic Rate) represents calories burned at complete rest, while TDEE (Total Daily Energy Expenditure) includes all daily activities and exercise.

Q2: 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% for most individuals.

Q3: Does this equation work for both men and women?
A: This specific equation is for women. For men, the equation is: BMR = 10 × weight + 6.25 × height - 5 × age + 5.

Q4: How often should I recalculate my BMR?
A: You should recalculate your BMR whenever your weight changes significantly (5+ kg) or annually as you age.

Q5: Can BMR change over time?
A: Yes, BMR can change due to factors like aging, weight loss/gain, muscle mass changes, and hormonal fluctuations.