1. What is Basal Metabolic Rate?

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:

Where:

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

Explanation: This equation is currently considered the most accurate for estimating BMR in healthy individuals.

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 calculating Total Daily Energy Expenditure (TDEE) when combined with activity level.

4. Using the Calculator

Tips: For most accurate results, measure your weight and height right before calculation. The equation is most accurate for adults with average body composition.

5. Frequently Asked Questions (FAQ)

Q1: How does BMR differ from metabolism?
A: BMR is the largest component (about 60-75%) of total metabolism, which also includes energy used for digestion and physical activity.

Q2: What factors affect BMR?
A: Muscle mass, age, genetics, hormones, body size, and environmental temperature all influence BMR.

Q3: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (±5kg) or every 6 months as you age.

Q4: Why is BMR different for men and women?
A: Men typically have more muscle mass and less body fat, resulting in higher BMR at the same weight.

Q5: Can I increase my BMR?
A: Yes, through strength training to increase muscle mass and avoiding extreme calorie restriction.