1. What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological 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:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• +5 — Adjustment for men
• -161 — Adjustment for women

Explanation: The equation accounts for differences in body composition and metabolic rates between genders.

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine your daily calorie needs for weight maintenance, loss, or gain. It's the foundation for calculating Total Daily Energy Expenditure (TDEE).

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, and select gender. For accurate results, measure weight and height without clothes and shoes.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this BMR calculation?
A: The Mifflin-St Jeor equation is considered the most accurate for estimating BMR in healthy individuals (±10% accuracy).

Q2: What factors affect BMR?
A: Muscle mass, age, genetics, hormonal status, body size, and environmental temperature all influence BMR.

Q3: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (±5 kg) or every 6 months as you age.

Q4: Does this account for activity level?
A: No, this is just BMR. Multiply by an activity factor (1.2-2.5) to estimate total daily calorie needs.

Q5: Why is BMR different for men and women?
A: Men typically have more muscle mass and less body fat than women of the same weight, resulting in higher BMR.