1. What is BMR?

Basal Metabolic Rate (BMR) 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, including breathing, circulation, and cell production.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation for women:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• -161 — Constant adjustment for women

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

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine your daily calorie needs for weight maintenance, loss, or gain. It serves as the foundation for calculating Total Daily Energy Expenditure (TDEE) when combined with activity level.

4. Using the Calculator

Tips: Enter weight in kilograms, height in centimeters, and age in years. For accurate results, measure weight and height in the morning before eating.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the BMR calculation?
A: The Mifflin-St Jeor equation is about 70-80% accurate for most people. For precise measurements, indirect calorimetry is needed.

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

Q3: Why is BMR different for men and women?
A: Men typically have more muscle mass and less body fat, resulting in higher BMR. The equations account for these physiological differences.

Q4: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (±5kg) or every 6 months as metabolism changes with age and body composition.

Q5: Can I use BMR for weight loss?
A: Yes, consuming fewer calories than your BMR creates a deficit, but don't go below BMR without medical supervision as it's your body's minimum requirement.