1. What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions at rest. It accounts for 60-75% of daily calorie expenditure.

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
• \( activity\_factor \) — Multiplier based on activity level

Explanation: The equation estimates calories needed for weight maintenance (BMR × activity factor) minus a 500-calorie deficit for weight loss.

3. Importance of BMR Calculation

Details: Knowing your BMR helps create effective weight loss plans by determining your baseline calorie needs before adding activity factors.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is this equation specific to men?
A: Men typically have more muscle mass than women, which increases BMR. The equation accounts for this biological difference.

Q2: How accurate is this calculation?
A: It provides a good estimate (±10%) for most people, but individual variations in muscle mass and metabolism can affect accuracy.

Q3: Why subtract 500 calories?
A: A 500-calorie daily deficit typically results in about 0.5kg (1lb) of weight loss per week, a safe and sustainable rate.

Q4: Should I eat below my BMR to lose weight?
A: No, eating below BMR can slow metabolism. Instead, create a deficit through activity while eating at or slightly above BMR.

Q5: How often should I recalculate my BMR?
A: Recalculate every 5-10kg of weight loss or if your activity level changes significantly.