1. What is Basal Metabolic Rate (BMR)?

BMR (Basal Metabolic Rate) represents the number of calories your body needs to maintain basic physiological functions at rest. It accounts for 60-75% of daily calorie expenditure in most people.

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
• \( gender\_factor \) — +5 for men, -161 for women

Explanation: The equation estimates the calories burned at complete rest based on body size, age, and gender.

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine daily calorie needs for weight maintenance, loss, or gain. It's the foundation for all metabolic calculations.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, and select gender. For accurate results, measure weight in the morning after using the bathroom.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this BMR calculation?
A: The Mifflin-St Jeor equation is about 90% accurate for most people, though individual variations exist.

Q2: What's the difference between BMR and RMR?
A: BMR measures strict resting conditions, while RMR (Resting Metabolic Rate) is measured under less strict conditions and is typically slightly higher.

Q3: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. Those with more muscle mass typically have higher BMRs.

Q4: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (5+ kg) or every 6 months as metabolism changes with age.

Q5: Can I increase my BMR?
A: Yes, through building muscle mass, proper hydration, adequate protein intake, and regular exercise.