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Mifflin-St Jeor Equation:
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The Mifflin-St Jeor equation is a formula used to calculate Basal Metabolic Rate (BMR), which represents the number of calories your body needs at rest to maintain basic physiological functions. It's considered one of the most accurate BMR formulas for the general population.
The calculator uses the Mifflin-St Jeor equation:
Where:
Explanation: This equation estimates your basal metabolic rate, which is the number of calories your body burns at complete rest to maintain vital functions.
Details: Knowing your BMR is essential for creating effective weight management plans, whether for weight loss, maintenance, or gain. It serves as the foundation for determining your total daily energy expenditure.
Tips: Enter your weight in kilograms, height in centimeters, and age in years. All values must be valid (weight > 0, height > 0, age between 1-120).
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 formulas for the general population, with an accuracy of about ±10% for most people.
Q3: Should I use this equation if I'm very muscular or obese?
A: While generally accurate, the equation may slightly underestimate BMR for very muscular individuals and overestimate for obese individuals.
Q4: How often should I recalculate my BMR?
A: You should recalculate whenever your weight changes significantly (5+ kg), or at least every 6 months as age and body composition change.
Q5: How do I use my BMR for weight management?
A: Multiply your BMR by an activity factor (1.2-1.9) to estimate total daily energy needs, then adjust calorie intake based on your weight goals.