1. What is Resting Energy Expenditure?

Resting Energy Expenditure (REE) represents the amount of energy your body needs to maintain basic physiological functions at rest, such as breathing, circulation, and cell production. It accounts for the largest portion of your total daily energy expenditure.

2. How Does the Calculator Work?

The calculator uses the standard REE equation:

Where:

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

Explanation: This equation provides an estimate of the calories your body burns at complete rest over 24 hours.

3. Importance of REE Calculation

Details: Knowing your REE is essential for weight management, nutritional planning, and understanding your metabolic rate. It serves as the foundation for calculating total daily energy needs.

4. Using the Calculator

Tips: Enter accurate measurements of weight in kg, height in cm, and age in years. Select your gender for the appropriate adjustment factor. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this REE calculation?
A: This provides a reasonable estimate for most healthy adults, but individual variations in metabolism can affect accuracy by ±10-15%.

Q2: What factors can affect REE?
A: Muscle mass, body composition, hormonal factors, genetics, and environmental temperature can all influence resting energy expenditure.

Q3: How often should I recalculate my REE?
A: Recalculate when your weight changes significantly (5+ kg), or every 6-12 months as you age.

Q4: Can this be used for athletes or bodybuilders?
A: While it provides a baseline, athletes with high muscle mass may have higher REE than calculated. More specialized equations may be needed.

Q5: How does REE differ from BMR?
A: REE and Basal Metabolic Rate (BMR) are often used interchangeably, though BMR is measured under more strict conditions and is typically slightly lower.