1. What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions at rest. This includes breathing, circulation, cell production, and nutrient processing.

2. How Does the Calculator Work?

The calculator uses the NHS BMR equation:

Where:

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

Explanation: This equation calculates the basal metabolic rate for women. For men, a different equation would be used (not shown here).

3. Importance of BMR Calculation

Details: Knowing your BMR helps in creating effective weight management plans, whether for weight loss, maintenance, or gain. It forms the foundation for calculating your total daily energy expenditure.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, and age in years. All values must be valid (weight > 0, height > 0, age between 1-120). For accurate results, use current measurements.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and TDEE?
A: BMR is the calories burned at complete rest, while TDEE (Total Daily Energy Expenditure) includes all activities and is typically higher than BMR.

Q2: Why are there different BMR formulas?
A: Different formulas were developed from various population studies. The NHS formula is specifically calibrated for the UK population.

Q3: How often should I recalculate my BMR?
A: You should recalculate your BMR whenever your weight changes significantly (5+ kg) or annually as you age.

Q4: Does this calculator work for men?
A: This specific formula is designed for women. Men would typically use: BMR = 66.5 + (13.75 × weight) + (5.003 × height) - (6.75 × age)

Q5: How accurate is the BMR calculation?
A: While formulas provide a good estimate, individual variations in metabolism mean actual BMR may differ by ±10-15% from calculated values.