1. What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to accomplish its most basic (basal) life-sustaining functions at rest. This includes breathing, circulation, cell production, and nutrient processing.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( +5 \) — Constant for men
• \( -161 \) — Constant for women

BMI Calculation: \( weight (kg) / height (m)^2 \)

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine your daily calorie needs for weight maintenance, loss, or gain. Combined with BMI, it provides a comprehensive view of your metabolic health.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, and select gender. For accurate results, measure weight in the morning before eating and after using the bathroom.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the BMR calculation?
A: The Mifflin-St Jeor equation is about 90% accurate for most people, but individual variations in muscle mass and body composition can affect actual BMR.

Q2: What's the difference between BMR and TDEE?
A: BMR is calories burned at complete rest. Total Daily Energy Expenditure (TDEE) includes all daily activities and exercise.

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

Q4: Why is BMI included with BMR?
A: BMI provides context for your BMR - those with higher BMI often have higher BMR due to larger body mass.

Q5: Can athletes use this calculator?
A: Very muscular athletes may get misleading BMI results (showing overweight when healthy), but BMR calculation remains valid.