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, nutrient processing, protein synthesis, and ion transport.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation for men:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years

Daily Calorie Needs: The BMR is then multiplied by an activity factor to estimate total daily energy expenditure (TDEE).

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 most nutrition and diet planning.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your activity level. For accurate results, measure your weight and height precisely.

5. Frequently Asked Questions (FAQ)

Q1: Why is this equation specific to men?
A: Men typically have more muscle mass and less body fat than women, which affects metabolic rate. The equation accounts for these physiological differences.

Q2: How accurate is the BMR calculation?
A: The Mifflin-St Jeor Equation is about 90% accurate for most people. For elite athletes or those with very high/low body fat, more specialized testing may be needed.

Q3: Should I eat below my BMR to lose weight?
A: Generally no - eating below BMR can slow metabolism. Instead, create a deficit from your TDEE (BMR × activity factor).

Q4: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (±5kg) or every 6 months as metabolism changes with age and body composition.

Q5: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. Those with more muscle mass will have a higher BMR.