1. What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions at rest. It accounts for 60-75% of daily calorie expenditure and is crucial for weight management.

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
• \( +5 \) — Constant for men
• \( -161 \) — Constant for women

Explanation: The equation estimates calories needed at complete rest based on body composition and demographic factors.

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 personalized nutrition planning.

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 bathroom use and before eating.

5. Frequently Asked Questions (FAQ)

Q1: How does BMR differ from TDEE?
A: BMR is calories burned at rest, while Total Daily Energy Expenditure (TDEE) includes activity and is typically 1.2-2.5× BMR.

Q2: Why is BMR higher for men?
A: Men generally have more muscle mass, which is metabolically more active than fat tissue.

Q3: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (±5 kg) or every 6 months as metabolism changes with age.

Q4: Can I increase my BMR?
A: Yes, through muscle-building exercises, proper hydration, and adequate protein intake.

Q5: What's a healthy BMI range?
A: 18.5-24.9 is normal, 25-29.9 is overweight, and 30+ is obese. Athletes may have higher BMIs due to muscle mass.