BEE & TEE Calculator

Sex:

Age: years

Height:

Weight:

Activity Level:

Stress Factor:

Temperature:

1. What is a BEE Calculator?

Definition: This calculator computes your Basal Energy Expenditure (BEE), the number of calories your body needs at rest, and your Total Energy Expenditure (TEE), which includes activity, stress, and temperature factors.

Purpose: It helps estimate daily calorie needs for nutritional planning, weight management, or medical purposes, especially for individuals with specific health conditions or activity levels.

2. How Does the Calculator Work?

The calculator takes sex, age, height, weight, activity level, stress factor, and temperature, with selectable units, and computes:

Basal Energy Expenditure (BEE):
- For Women: \( \text{BEE} = 655.1 + (9.563 \times \text{weight in kg}) + (1.850 \times \text{height in cm}) - (4.676 \times \text{age}) \).
- For Men: \( \text{BEE} = 66.5 + (13.75 \times \text{weight in kg}) + (5.003 \times \text{height in cm}) - (6.775 \times \text{age}) \).
- Result in kcal/day.
Total Energy Expenditure (TEE):
- Formula: \( \text{TEE} = \text{BEE} \times \text{Activity Factor} \times \text{Stress Factor} \times \text{Temperature Factor} \).
- Result in kcal/day.

Unit Conversions:

Height: cm, m, in, ft (e.g., 1 m = 100 cm = 39.3701 in).
Weight: kg, lb, oz (e.g., 1 kg = 2.20462 lb).

Steps:

Select your sex.
Input your age (in years), height, and weight with chosen units.
Select your activity level, stress factor, and temperature.
Compute your BEE and TEE.

3. Importance of BEE and TEE Calculations

Calculating BEE and TEE is useful for:

Nutritional Planning: Determines calorie needs for maintaining, gaining, or losing weight, especially in medical settings.
Medical Applications: Adjusts calorie requirements for patients with conditions like burns or sepsis, considering stress and temperature factors.
Health Monitoring: Helps individuals understand their energy expenditure to support fitness or recovery goals.

4. Using the Calculator

Examples:

Male, Age 30: Height = 180 cm, Weight = 70 kg, Activity = Moderate to active (1.76), Stress = None (1.0), Temperature = Normal (1.0)
BEE: \( 66.5 + (13.75 \times 70) + (5.003 \times 180) - (6.775 \times 30) \approx 1726.04 \, \text{kcal/day} \).
TEE: \( 1726.04 \times 1.76 \times 1.0 \times 1.0 \approx 3037.83 \, \text{kcal/day} \).
Female, Age 40: Height = 65 in (165.1 cm), Weight = 130 lb (58.97 kg), Activity = Light or sedentary (1.53), Stress = Burns (1.52), Temperature = 102.2°F (1.2)
BEE: \( 655.1 + (9.563 \times 58.97) + (1.850 \times 165.1) - (4.676 \times 40) \approx 1327.34 \, \text{kcal/day} \).
TEE: \( 1327.34 \times 1.53 \times 1.52 \times 1.2 \approx 3705.37 \, \text{kcal/day} \).

5. Frequently Asked Questions (FAQ)

Q: What does BEE represent?
A: BEE represents the number of calories your body needs at rest to maintain basic functions like breathing, circulation, and cell production, measured in kcal/day.

Q: What does TEE include?
A: TEE includes your BEE adjusted for activity level, stress factors (e.g., medical conditions), and temperature effects, providing a more comprehensive estimate of daily calorie needs.

Q: Why do stress factors differ by sex?
A: Stress factors account for the varying metabolic impacts of conditions on men and women due to differences in body composition and hormonal responses, ensuring more accurate TEE calculations.