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 about 60-70% of your total daily energy expenditure.

2. How Does the Calculator Work?

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

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 your resting calorie needs, then adjusts for activity level and creates a 500-calorie deficit for weight loss.

3. Importance of BMR and Caloric Deficit

Details: Understanding your BMR helps create effective weight loss plans. A 500-calorie daily deficit typically leads to about 0.5kg (1lb) of weight loss per week.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is this equation specific to women?
A: Women typically have lower BMR than men due to differences in body composition. This equation accounts for those physiological differences.

Q2: How accurate is the BMR calculation?
A: The Mifflin-St Jeor equation is about 70% accurate for most people. For precise measurement, metabolic testing is needed.

Q3: Is a 500-calorie deficit safe for everyone?
A: Generally yes, but very petite women or those with low BMR should consult a nutritionist before creating large deficits.

Q4: Should I eat exactly these deficit calories?
A: This is a starting point. Adjust based on your weight loss progress and how you feel. Never go below 1200 kcal/day without medical supervision.

Q5: How often should I recalculate my BMR?
A: Recalculate every 5-10kg of weight loss, as your BMR decreases with weight loss.