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Resting Metabolic Rate (RMR) Formula:
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Resting Metabolic Rate (RMR) represents the number of calories your body burns at complete rest to maintain basic physiological functions like breathing, circulation, and cell production. It's often used interchangeably with Basal Metabolic Rate (BMR), though RMR is typically slightly higher.
The calculator uses the Mifflin-St Jeor equation:
Where:
Explanation: This equation is considered one of the most accurate for estimating RMR in healthy individuals.
Details: Knowing your RMR is essential for creating effective weight management plans, whether for weight loss, maintenance, or gain. It forms the foundation for determining your total daily energy expenditure.
Tips: Enter your weight in kilograms, height in centimeters, age in years, and select your gender. For accurate results, use precise measurements and fasted morning values if possible.
Q1: What's the difference between RMR and BMR?
A: BMR measures energy expenditure in a completely fasted and rested state, while RMR is measured under less strict conditions. RMR is typically about 10% higher than BMR.
Q2: How accurate is this RMR calculation?
A: The Mifflin-St Jeor equation is about 80% accurate for most people. For more precise measurement, consider indirect calorimetry testing.
Q3: Does muscle mass affect RMR?
A: Yes, muscle tissue is more metabolically active than fat tissue. People with more muscle mass typically have a higher RMR.
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, hormonal changes, and certain medical conditions.
Q5: Should I use RMR for weight loss planning?
A: Yes, knowing your RMR helps create a appropriate caloric deficit for sustainable weight loss while maintaining muscle mass and energy levels.