Metabolic Base Rate Calculator For Weight Loss

BMR Equation:

\[ BMR = 10 \times Weight + 6.25 \times Height - 5 \times Age + 5 \text{ (men)} \text{ or } -161 \text{ (women)} \]

Weight:

Height:

Age:

years

Gender:

Basal Metabolic Rate (BMR):

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1. What is Basal Metabolic Rate (BMR)?

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 maintain vital organs such as the heart, lungs, and brain.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

\[ BMR = 10 \times Weight + 6.25 \times Height - 5 \times Age + 5 \text{ (men)} \text{ or } -161 \text{ (women)} \]

Where:

\( Weight \) — Body weight in kilograms (kg)
\( Height \) — Height in centimeters (cm)
\( Age \) — Age in years
\( +5 \) — Constant for men
\( -161 \) — Constant for women

Explanation: This equation provides a more accurate estimate of BMR compared to older formulas and accounts for gender differences in metabolism.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for effective weight management. It helps determine your daily caloric needs for weight loss, maintenance, or gain when combined with your activity level.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, age in years, and select your gender. For accurate results, use precise measurements and fast for at least 12 hours before calculation if possible.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the BMR calculation?
A: The Mifflin-St Jeor equation is considered one of the most accurate BMR formulas, with an accuracy of about ±10% for most individuals.

Q2: What's 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 1.2-2.0 times your BMR.

Q3: How often should I recalculate my BMR?
A: Recalculate every 3-6 months or after significant weight changes (±5 kg) as your metabolic rate changes with body composition.

Q4: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. Increasing muscle mass can raise your BMR.

Q5: Can medical conditions affect BMR?
A: Yes, thyroid disorders, hormonal imbalances, and certain medications can significantly increase or decrease your metabolic rate.