1. What is Basal Metabolic Rate (BMR)?

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 for females:

Where:

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

Explanation: This equation provides the most accurate estimate of BMR for the general population and is widely used by health professionals.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for creating effective weight management plans, whether for weight loss, maintenance, or gain. It forms the foundation for calculating your total daily energy expenditure.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, and age in years. All values must be valid (weight > 0, height > 0, age between 1-120). For accurate results, use your current measurements.

5. Frequently Asked Questions (FAQ)

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

Q2: How often should I recalculate my BMR?
A: You should recalculate your BMR whenever your weight changes significantly (5+ kg) or as you age, since metabolism naturally slows with age.

Q3: Can exercise affect my BMR?
A: Yes, regular exercise, particularly strength training, can increase your BMR by building muscle mass, which burns more calories at rest than fat tissue.

Q4: Why is the equation different for males and females?
A: Men typically have more muscle mass and less body fat than women of the same weight, resulting in a higher metabolic rate, which is accounted for in gender-specific equations.

Q5: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR prediction equations, with an accuracy of about ±10% for most people when compared to laboratory measurements.