Rmr Calculator

Mifflin-St Jeor Equation:

\[ RMR = 10 \times weight + 6.25 \times height - 5 \times age + 5 \text{ (men)} \text{ or } -161 \text{ (women)} \]

Weight:

Height:

Age:

years

Gender:

Resting Metabolic Rate (RMR):

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1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula for estimating resting metabolic rate (RMR), which represents the number of calories your body burns at rest to maintain basic physiological functions. It's considered one of the most accurate equations for RMR estimation.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

\[ RMR = 10 \times weight + 6.25 \times height - 5 \times age + 5 \text{ (men)} \text{ or } -161 \text{ (women)} \]

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: The equation accounts for the basic metabolic needs based on body size, age, and gender differences in metabolic rate.

3. Importance of RMR Calculation

Details: Knowing your RMR is essential for creating effective weight management plans, determining daily caloric needs, and designing appropriate nutrition strategies for health and fitness goals.

4. Using the Calculator

Tips: Enter weight in kilograms, height in centimeters, age in years, and select 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 RMR and BMR?
A: RMR (Resting Metabolic Rate) and BMR (Basal Metabolic Rate) are often used interchangeably, but BMR is measured under more strict conditions while RMR is slightly higher and more practical for everyday use.

Q2: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate prediction equations, with about 90% accuracy for most healthy adults, though individual variations exist.

Q3: Should I use this for weight loss planning?
A: Yes, RMR provides the foundation for calculating your total daily energy expenditure. For weight loss, create a calorie deficit based on your RMR plus activity calories.

Q4: Does muscle mass affect RMR?
A: Yes, muscle tissue is more metabolically active than fat tissue. Individuals with higher muscle mass typically have higher RMR values.

Q5: How often should I recalculate my RMR?
A: Recalculate whenever your weight changes significantly (5+ kg), or annually as age affects metabolic rate.