Bmr Calculator Formula

Mifflin-St Jeor Equation:

For Men: \[ BMR = 10 \times weight + 6.25 \times height - 5 \times age + 5 \] For Women: \[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \]

Weight:

Height:

Age:

years

Gender:

Basal Metabolic Rate (BMR):

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1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula for calculating basal metabolic rate (BMR), which represents the number of calories your body needs at rest to maintain basic physiological functions. It is considered one of the most accurate BMR formulas available.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

For Men: \[ BMR = 10 \times weight + 6.25 \times height - 5 \times age + 5 \]
For Women: \[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years
Different constants are applied based on gender

Explanation: The equation accounts for the fact that men typically have higher metabolic rates than women due to differences in body composition and hormonal factors.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for weight management, creating effective diet plans, and understanding your body's energy requirements. It forms the foundation for calculating total daily energy expenditure (TDEE).

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, age in years, and select your gender. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and RMR?
A: BMR (Basal Metabolic Rate) measures energy expenditure at complete rest, while RMR (Resting Metabolic Rate) is measured under less strict conditions. They are often used interchangeably but BMR is typically slightly lower.

Q2: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR equations for the general population, with an accuracy of about ±10% for most individuals.

Q3: Why are there different formulas for men and women?
A: Men generally have more muscle mass and less body fat than women, which results in a higher metabolic rate. The different constants account for these physiological differences.

Q4: How often should I recalculate my BMR?
A: You should recalculate your BMR whenever there are significant changes in your weight, body composition, or age (approximately every 3-6 months or after significant weight loss/gain).

Q5: Can BMR be increased?
A: Yes, through regular exercise (especially strength training), building muscle mass, proper nutrition, and adequate sleep. Muscle tissue burns more calories at rest than fat tissue.