Calculator For Resting Metabolic Rate

RMR 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 Resting Metabolic Rate?

Resting Metabolic Rate (RMR) represents the number of calories your body burns at rest to maintain basic physiological functions such as breathing, circulation, and cell production. It accounts for the majority of your total daily energy expenditure.

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 males
-161 — Constant for females

Explanation: This equation is considered one of the most accurate for estimating RMR in healthy individuals and accounts for differences in metabolic rates between genders.

3. Importance of RMR Calculation

Details: Knowing your RMR is essential for creating effective weight management plans, determining appropriate calorie intake for weight loss or gain, and understanding your body's energy requirements.

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's the difference between RMR and BMR?
A: While often used interchangeably, RMR (Resting Metabolic Rate) is typically measured under less restrictive conditions than BMR (Basal Metabolic Rate), making RMR slightly higher and more practical for everyday use.

Q2: How accurate is this calculation?
A: The Mifflin-St Jeor Equation is about 90% accurate for most people. For precise measurements, professional metabolic testing is recommended.

Q3: Does muscle mass affect RMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. Individuals with higher muscle mass typically have higher RMR values.

Q4: How often does RMR change?
A: RMR decreases with age (about 1-2% per decade after age 20) and changes with body composition alterations, weight loss/gain, and hormonal changes.

Q5: Can I increase my RMR?
A: Yes, through regular exercise (especially strength training), maintaining muscle mass, proper nutrition, and adequate sleep can help maintain or increase your metabolic rate.