Calculate Daily Resting Energy Expenditure

RDEE Formula:

\[ RDEE = BMR \times Activity Factor \]

Daily Resting Energy Expenditure (RDEE):

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1. What is RDEE?

RDEE (Resting Daily Energy Expenditure) represents the total number of calories your body burns in a day, calculated by multiplying your Basal Metabolic Rate (BMR) by an activity factor that accounts for your daily physical activity level.

2. How Does the Calculator Work?

The calculator uses the RDEE formula:

\[ RDEE = BMR \times Activity Factor \]

Where:

\( BMR \) — Basal Metabolic Rate (kcal)
\( Activity Factor \) — Multiplier based on activity level (unitless)

Explanation: The equation accounts for your baseline metabolism plus the energy expended through daily activities and exercise.

3. Importance of RDEE Calculation

Details: Accurate RDEE estimation is crucial for weight management, nutrition planning, athletic training, and medical nutrition therapy. It helps determine appropriate calorie intake for weight maintenance, loss, or gain.

4. Using the Calculator

Tips: Enter your BMR in kcal and an appropriate activity factor. Common activity factors range from 1.2 (sedentary) to 2.5 (extremely active). All values must be valid (BMR > 0, activity factor ≥ 1.0).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and RDEE?
A: BMR represents calories burned at complete rest, while RDEE includes calories burned through daily activities and exercise.

Q2: How do I determine my activity factor?
A: Common values are: 1.2 (sedentary), 1.375 (light activity), 1.55 (moderate activity), 1.725 (very active), and 1.9-2.5 (extremely active).

Q3: How accurate is RDEE calculation?
A: While useful for estimation, individual variations in metabolism and activity patterns mean actual energy expenditure may differ. For precise measurements, clinical methods like indirect calorimetry are recommended.

Q4: Should I use RDEE for weight loss planning?
A: Yes, RDEE provides a good starting point for determining calorie needs. For weight loss, create a deficit of 500-1000 calories per day from your RDEE.

Q5: How often should I recalculate my RDEE?
A: Recalculate when your weight changes significantly, activity level changes, or every 3-6 months to account for metabolic adaptations.