Loading Calculator...
How to use BEE Calculator
- Pick mode and units: Choose Basic BEE Mode for resting needs or Clinical / TEE Mode to include activity and clinical factors, then select metric (kg/cm) or imperial (lb/in).
- Enter demographic data: Provide sex, age, height, and weight; the calculator converts units and feeds them into the Harris‑Benedict equations.
- Set clinical factors (TEE mode): Choose activity level (for example bed‑ridden 1.2), stress/injury factor (such as surgery or trauma), and temperature factor (fever vs normal), each with its own multiplier.
- Read BEE and TEE results: The output shows BEE in kcal/day and kJ/day, and—when factors are used—TEE, the total calories needed including movement, stress, and thermal effects.
About BEE Calculator
What the BEE Calculator does
The BEE Calculator estimates how many calories your body burns at complete rest in 24 hours, known as basal energy expenditure.
In Clinical / TEE Mode, it multiplies this baseline by activity, stress or injury, and body‑temperature factors to approximate total daily energy expenditure for real‑world or hospital settings.
Formulas and calculation method
The calculator uses the original Harris‑Benedict equations for basal energy expenditure.
- Men (metric):
- BEE=66.5+13.75×weight(kg)+5.003×height(cm)−6.775×ageBEE=66.5+13.75×weight(kg)+5.003×height(cm)−6.775×age.
- Women (metric):
- BEE=655.1+9.563×weight(kg)+1.850×height(cm)−4.676×ageBEE=655.1+9.563×weight(kg)+1.850×height(cm)−4.676×age.
In Clinical / TEE Mode, total energy needs are:
TEE=BEE×activity×stress×temperatureTEE=BEE×activity×stress×temperature.
Activity multipliers typically range from about 1.2 for bed‑ridden patients to around 2.0–2.5 for very active individuals; stress and temperature factors raise needs further in illness or fever.
Outputs and interpretation
- Basal Energy Expenditure (BEE): Resting calories per day, often around 1,200–1,500 kcal/day for women and 1,500–1,800 kcal/day for men, with individual variation.
- Total Energy Expenditure (TEE): BEE adjusted for movement, stress, and temperature, representing practical daily calorie needs in clinical or lifestyle contexts.
- Context notes: Many tools explain that BEE/“BMR” is baseline organ energy, while TDEE/TEE includes digestion, daily activity, and recovery, and they stress that results are estimates, not medical prescriptions.
When to use a BEE Calculator
- Nutrition and weight planning: Use BEE and TEE as starting points to set maintenance calories and then apply a deficit or surplus for weight loss or gain, ideally under professional guidance.
- Clinical and hospital settings: Dietitians and clinicians use BEE‑based equations with stress and temperature factors to size enteral or parenteral nutrition for patients.
- Fitness and health tracking: Active individuals can pair BEE results with activity multipliers to choose calorie targets that support training and recovery.