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.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor BMR equation:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( +5 \) — Male adjustment
• \( -161 \) — Female adjustment

Explanation: The equation estimates the calories needed to maintain basic bodily functions at complete rest.

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 creating personalized nutrition plans.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How accurate is BMR calculation?
A: The Mifflin-St Jeor equation is about 90% accurate for most people, but individual variations exist due to muscle mass, genetics, and other factors.

Q2: What's the difference between BMR and TDEE?
A: BMR is calories at complete rest, while Total Daily Energy Expenditure (TDEE) includes activity and accounts for all calories burned in a day.

Q3: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. People 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 annually as metabolism slows with age.

Q5: Can I use BMR for weight loss?
A: Yes, creating a calorie deficit based on your BMR and activity level is the foundation of weight loss plans.