1. What is the BMR Calculation Formula?

The BMR (Basal Metabolic Rate) equation estimates the number of calories your body needs to maintain basic physiological functions at rest. It accounts for weight, height, age, and gender.

2. How Does the Calculator Work?

The calculator uses the BMR equation:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in centimeters (cm)
• \( age \) — Age in years
• \( gender\_factor \) — +5 for men, -161 for women

Explanation: The equation estimates your body's energy requirements at complete rest, accounting for differences in body composition between genders.

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine daily calorie needs for weight maintenance, loss, or gain. It's the foundation for most calorie requirement calculations.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, and select gender. For accurate results, measure weight and height without clothes and shoes.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this BMR formula?
A: This is the Mifflin-St Jeor equation, currently considered the most accurate for healthy individuals. Accuracy decreases for very muscular or obese individuals.

Q2: What's the difference between BMR and TDEE?
A: BMR is calories burned at complete rest. TDEE (Total Daily Energy Expenditure) includes activity and is typically 1.2-2.5 × BMR.

Q3: Why is the gender factor different?
A: Men typically have more muscle mass and less body fat than women of the same weight, resulting in higher metabolic rates.

Q4: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (±5kg) or annually as you age, since metabolism slows with age.

Q5: Can athletes use this formula?
A: Very muscular athletes may get underestimates. Specialized formulas or indirect calorimetry may be more accurate for them.