1. What is Basal Metabolic Rate?

Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions at rest. This includes breathing, circulation, cell production, and nutrient processing.

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

Explanation: This equation is considered one of the most accurate for calculating BMR in healthy individuals.

3. Importance of BMR Calculation

Details: Knowing your BMR helps in creating effective weight management plans, determining daily calorie needs, and understanding your body's energy requirements at rest.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your gender. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between BMR and RMR?
A: BMR measures energy expenditure in a completely rested state, while RMR (Resting Metabolic Rate) is measured under less strict conditions and is typically slightly higher.

Q2: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate equations for estimating BMR in healthy individuals, with an accuracy of about ±10%.

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 a higher BMR.

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

Q5: Can I increase my BMR?
A: Yes, through regular exercise (especially strength training), building muscle mass, and maintaining proper nutrition.