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 for women:

Where:

• \( weight \) — Weight in kilograms (kg)
• \( height \) — Height in centimeters (cm)
• \( age \) — Age in years
• \( activity\_factor \) — Multiplier based on activity level
• -500 — Calorie deficit for weight loss (approximately 0.5kg per week)

Explanation: The equation estimates your resting energy expenditure, then adjusts for activity level and creates a moderate calorie deficit for weight loss.

3. Importance of BMR Calculation

Details: Knowing your BMR helps create personalized nutrition plans for weight management. The weight loss calculation provides a safe, sustainable calorie target.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why subtract 500 calories?
A: A 500-calorie daily deficit typically results in about 0.5kg (1lb) of weight loss per week, which is considered safe and sustainable.

Q2: Is this calculator only for women?
A: Yes, this uses the female-specific equation. Men should use a different calculator with the male equation.

Q3: How accurate is the BMR calculation?
A: It provides a good estimate (±10%) for most people, but individual variations exist due to muscle mass, genetics, and other factors.

Q4: Should I eat below my BMR to lose weight?
A: Generally no. Eating below BMR can slow metabolism. This calculator creates a deficit from your total daily energy expenditure (TDEE).

Q5: How often should I recalculate?
A: Recalculate every 5-10kg of weight loss or if your activity level changes significantly.