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:

Where:

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

Explanation: The equation estimates calories burned at complete rest based on body composition and demographic factors.

3. Importance of BMR Calculation

Details: Knowing your BMR helps create personalized diet plans for weight loss, maintenance, or gain by determining your baseline calorie needs.

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 after using the bathroom.

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 accounts for all calories burned in a day.

Q2: What's a normal BMR range?
A: Typical BMR ranges are 1400-1800 kcal/day for women and 1600-2000 kcal/day for men, varying by size and body composition.

Q3: 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.

Q4: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue, so those with more muscle mass typically have higher BMR.

Q5: How to use BMR for weight loss?
A: Create a calorie deficit by consuming fewer calories than your TDEE (BMR × activity factor), typically 300-500 kcal below maintenance.