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 accounts for 60-75% of daily calorie expenditure in most people.

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 daily calorie needs for weight maintenance, loss, or gain. It's essential for creating personalized nutrition plans.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your gender. For best accuracy, measure weight and height in the morning before eating.

5. Frequently Asked Questions (FAQ)

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

Q2: Why is BMR different for men and women?
A: Men generally have more muscle mass and less body fat, resulting in higher BMR at the same weight.

Q3: How accurate is the Mifflin-St Jeor equation?
A: It's about 90% accurate for most people, but individual variations exist due to body composition and other factors.

Q4: Does BMR change with age?
A: Yes, BMR typically decreases by 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 build muscle, proper nutrition, and adequate sleep.