1. What is Basal Metabolic Rate?

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, 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 accounts for the energy needed to maintain body mass, with adjustments for height, age, and gender differences in metabolism.

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine your 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, and age in years. For accurate results, measure weight in the morning after using the bathroom and before eating.

5. Frequently Asked Questions (FAQ)

Q1: How does BMR differ from TDEE?
A: BMR is calories burned at complete rest. TDEE (Total Daily Energy Expenditure) includes activity and is typically 1.2-2.5× BMR depending on activity level.

Q2: Why is BMR lower for women than men?
A: Women generally have higher body fat percentages and less muscle mass, which results in a lower metabolic rate.

Q3: How accurate is this calculation?
A: The Mifflin-St Jeor equation is about 70% accurate for most people. For precise measurement, metabolic testing is needed.

Q4: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. Those with more muscle mass will have a higher BMR.

Q5: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (±5kg) or every 6 months as metabolism changes with age.