Basal Energy Expenditure (BEE) Calculator
Calculate your body's baseline caloric requirements at complete rest using the Harris-Benedict equation.
Disclaimer: This calculator provides an estimate of your basal energy expenditure based on predictive equations. Individual needs may vary. Consult with a healthcare professional before making significant changes to your diet or exercise regimen.
Your Basal Energy Expenditure
BEE (Calories/day):
Equation Used:
Note: Basal Energy Expenditure (BEE) represents the minimum energy required to maintain vital body functions at complete rest. Your total daily energy needs will be higher based on your activity level.
Estimated Daily Energy Needs:
Understanding Basal Energy Expenditure
Basal Energy Expenditure (BEE), also known as Basal Metabolic Rate (BMR), represents the minimum amount of energy required by your body to maintain basic physiological functions at complete rest. These functions include breathing, circulation, body temperature regulation, cell growth, brain function, and other essential processes.
BEE vs. BMR vs. RMR: What's the Difference?
- Basal Energy Expenditure (BEE) or Basal Metabolic Rate (BMR): The minimum energy required by the body at complete rest, measured under very strict laboratory conditions after an overnight fast and complete rest.
- Resting Metabolic Rate (RMR): Similar to BMR but measured under less strict conditions. RMR is typically slightly higher than BMR (about 10-20%).
- Total Daily Energy Expenditure (TDEE): Your total daily calorie needs, which includes BEE plus additional energy for physical activity, digestion, and other factors.
Equations Used in This Calculator
This calculator offers three widely used equations to estimate BEE:
Harris-Benedict Equation (Original, 1919):
For men: BEE = 66.5 + (13.75 × weight in kg) + (5.003 × height in cm) - (6.775 × age in years)
For women: BEE = 655.1 + (9.563 × weight in kg) + (1.850 × height in cm) - (4.676 × age in years)
Harris-Benedict Equation (Revised, 1984):
For men: BEE = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age in years)
For women: BEE = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age in years)
Mifflin-St. Jeor Equation (1990):
For men: BEE = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5
For women: BEE = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161
Factors Affecting BEE
Several factors can influence your basal energy expenditure:
- Body composition: Higher muscle mass increases BEE
- Age: BEE typically decreases with age
- Gender: Men generally have higher BEE than women
- Genetics: Some people naturally have higher or lower metabolic rates
- Hormonal factors: Thyroid function and other hormones affect metabolism
- Environmental temperature: Extreme temperatures can increase BEE
- Health conditions: Certain medical conditions can affect BEE
Understanding your BEE can help you better plan your nutrition and exercise regimen to achieve your health and fitness goals.