1. What is BMR?

BMR (Basal Metabolic Rate) is the number of calories your body needs to maintain basic physiological functions at rest. It represents the minimum energy required to keep your body functioning.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation for men:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years

Explanation: This equation estimates the calories burned at complete rest based on your body size and age.

3. Importance of BMR Calculation

Details: Knowing your BMR helps in designing effective weight loss, maintenance, or gain programs. It's the foundation for calculating your total daily energy expenditure.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this BMR calculation?
A: The Mifflin-St Jeor Equation is considered the most accurate for estimating BMR in healthy individuals (about 80% accuracy).

Q2: What's the difference between BMR and TDEE?
A: BMR is calories burned at complete rest, while TDEE (Total Daily Energy Expenditure) includes all daily activities and exercise.

Q3: Why is the equation different for men and women?
A: Men typically have more muscle mass and less body fat than women of the same weight, which affects metabolic rate.

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

Q5: Can body composition affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue, so individuals with more muscle mass typically have higher BMRs.