1. What is the Harris-Benedict Equation?

The Harris-Benedict Equation estimates Resting Energy Expenditure (REE), which represents the number of calories your body needs at rest to maintain basic physiological functions. It's widely used in clinical nutrition and weight management.

2. How Does the Calculator Work?

The calculator uses the Harris-Benedict equation:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in centimeters (cm)
• \( age \) — Age in years
• \( s \) — Gender factor: +5 for males, -161 for females

Explanation: The equation calculates basal metabolic rate based on anthropometric measurements and gender-specific adjustments.

3. Importance of REE Calculation

Details: Accurate REE estimation is crucial for determining caloric needs in weight management, clinical nutrition planning, and designing appropriate dietary interventions for various health conditions.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, and select the appropriate gender factor. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between REE and BMR?
A: REE (Resting Energy Expenditure) and BMR (Basal Metabolic Rate) are often used interchangeably, though BMR is typically measured under more strict conditions.

Q2: How accurate is the Harris-Benedict equation?
A: While widely used, it may have ±10-15% error. More accurate methods include indirect calorimetry for precise measurement.

Q3: Should activity level be considered?
A: Yes, REE represents only resting needs. Total daily energy expenditure requires multiplication by activity factors (sedentary, active, etc.).

Q4: Are there limitations to this equation?
A: Less accurate in very obese or very muscular individuals, and those with abnormal metabolic conditions.

Q5: How often should REE be recalculated?
A: Recalculate with significant weight changes (±5 kg) or every 6-12 months as part of routine health assessment.