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 accounts for the fact that metabolism slows with age and is influenced by body size and composition.

3. Importance of BMR Calculation

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

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, and age in years. For accurate results, use precise measurements and fasted morning weight if possible.

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, with about 80% accuracy.

Q2: Why is BMR different for women and men?
A: Women typically have lower BMR due to generally higher body fat percentage and lower muscle mass compared to men of the same weight.

Q3: How can I use my BMR for weight loss?
A: To lose weight, consume fewer calories than your TDEE (BMR multiplied by activity factor). A deficit of 500 kcal/day typically results in about 0.5kg weight loss per week.

Q4: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. Increasing muscle mass through strength training can raise your BMR.

Q5: How often should I recalculate my BMR?
A: Recalculate whenever your weight changes significantly (5+ kg) or annually to account for age-related metabolic changes.