1. What is Basal Metabolic Rate?

Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions at rest. It represents the minimum energy required to keep your body functioning, including breathing, circulation, and cell production.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation for BMR:

Where:

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

For macronutrient breakdown:

• Protein: 25% of TDEE (4 calories per gram)
• Fat: 25% of TDEE (9 calories per gram)
• Carbohydrates: 50% of TDEE (4 calories per gram)

3. Importance of Macronutrient Calculation

Details: Proper macronutrient distribution is essential for optimal health, muscle maintenance, energy levels, and achieving specific fitness goals. Understanding your BMR and TDEE helps create effective nutrition plans for weight management.

4. Using the Calculator

Tips: Enter accurate measurements in kilograms and centimeters. Select your appropriate activity level based on your weekly exercise routine. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why use the Mifflin-St Jeor equation?
A: The Mifflin-St Jeor equation is considered one of the most accurate BMR formulas for the general population and is widely used in clinical settings.

Q2: What are typical BMR values?
A: BMR typically ranges from 1200-2000 kcal/day for women and 1600-2500 kcal/day for men, depending on age, weight, and height.

Q3: How often should I recalculate my BMR?
A: Recalculate every 3-6 months or whenever your weight changes significantly (more than 5 kg).

Q4: Are there limitations to this calculation?
A: This calculation may not be accurate for athletes, pregnant women, or individuals with certain medical conditions affecting metabolism.

Q5: Can I adjust the macronutrient ratios?
A: Yes, macronutrient ratios can be adjusted based on individual goals (weight loss, muscle gain, athletic performance).