1. What is Basal Metabolic Rate?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions at complete rest. It represents the minimum energy required for vital functions like breathing, circulation, and cell production.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Where:

• \( W \) — Weight in kilograms
• \( H \) — Height in centimeters
• \( A \) — Age in years
• \( S \) — +5 for males, -161 for females

Explanation: This equation is considered the most accurate for estimating BMR in healthy individuals, accounting for differences in body composition between genders.

3. Importance of BMR Calculation

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

4. Using the Calculator

Tips: For accurate results, measure weight and height precisely. The equation is most accurate for adults with average body composition. Very muscular or obese individuals may get less accurate estimates.

5. Frequently Asked Questions (FAQ)

Q1: How does BMR differ from metabolism?
A: BMR is the baseline measurement of metabolism at complete rest, while metabolism includes all energy expenditure including activity and digestion.

Q2: Why is BMR higher for men than women?
A: Men typically have more muscle mass and less body fat, which increases their resting energy expenditure.

Q3: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (5+ kg) or every 3-6 months as body composition changes.

Q4: Does age affect BMR?
A: Yes, BMR typically decreases about 1-2% per decade after age 20 due to loss of muscle mass.

Q5: Can I increase my BMR?
A: Yes, through strength training to increase muscle mass, proper nutrition, and adequate sleep.