BEE Calculator — Basal Energy Expenditure (Harris-Benedict)
Estimate your Basal Energy Expenditure (BEE) with the revised Harris-Benedict equation, then apply clinical stress and activity multipliers to get total daily energy needs.
Φύλο
kg
cm
χρόνια
Stress / injury factor
Επίπεδο δραστηριότητας
Calories needed at complete rest — Harris-Benedict revised 1984
- 1
Weight term
13,397 × 70 kg = 937,79 - 2
Height term
4,799 × 175 cm = 839,83 - 3
Age term
5,677 × 40 yrs = 227,08 - 4
Basal Energy Expenditure (BEE)
88,362 + 937,79 + 839,83 − 227,08 = 1.639 kcal/dayRevised Harris-Benedict equation (Roza & Shizgal, 1984).
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BEE estimates resting calorie needs via the revised Harris-Benedict equation: 88.362 + 13.397W + 4.799H − 5.677A (men) or 447.593 + 9.247W + 3.098H − 4.330A (women), in kg/cm/years. Multiply by a stress factor (1.0–1.8) and activity factor (1.0–1.55) to get total daily energy expenditure.
Τύπος
How this is calculated
Basal Energy Expenditure (BEE) is the minimum number of kilocalories the body needs at complete rest to maintain vital functions — breathing, circulation, cell repair and thermoregulation. This calculator uses the revised Harris-Benedict equation published by Roza and Shizgal in 1984, which refined the original 1919 coefficients using indirect calorimetry on a wider population. Men have higher BEE due to greater lean body mass; the sex-specific constants encode this difference. BEE is expressed in kcal per day and provides the foundation for clinical nutrition prescriptions.
In clinical settings, BEE is multiplied by two correction factors. The stress factor accounts for the increased metabolic demand of illness or injury: minor illness ≈ 1.1–1.2, moderate surgery or trauma ≈ 1.3–1.4, severe sepsis or major burns can reach 1.5–2.0. The activity factor adjusts for physical activity: bed-rested patients use 1.0, ambulatory patients about 1.2, and healthy individuals up to 1.55 for moderate activity. Total Energy Expenditure (TEE) = BEE × stress factor × activity factor.
The Harris-Benedict equation is still widely used in clinical dietetics because it is well-validated across many populations. It uses only four variables (weight, height, age, sex) and therefore cannot account for body composition — very muscular or very obese individuals may see systematic over- or under-estimates. The Mifflin-St Jeor equation is sometimes preferred for healthy weight-management calculations; Harris-Benedict is more prevalent in clinical nutrition protocols.
Συχνές ερωτήσεις
BEE (Basal Energy Expenditure) and BMR (Basal Metabolic Rate) refer to the same concept — calories burned at rest — but are calculated by different equations. BMR commonly uses the Mifflin-St Jeor formula preferred for healthy adults, while BEE uses the Harris-Benedict equation preferred in clinical nutrition and hospital settings.
Use 1.0 (none) for a healthy individual or someone recovering without complication. Use 1.15 for mild infection or minor surgery, 1.3 for major elective surgery or moderate trauma, 1.5 for severe sepsis or critical illness, and up to 1.8–2.0 for major burns. These are population-average estimates; a registered dietitian should refine them for individual patients.
Studies show Harris-Benedict (revised) predicts measured resting metabolic rate within about ±10% for the majority of adults. Accuracy is lower for people with extreme body compositions, the very elderly, or those with significant metabolic disease. For critical care patients, indirect calorimetry (metabolic cart measurement) is the gold standard when available.
Γνωστό και ως
TG we-Calculate Editorial Team. (2026). BEE Calculator — Basal Energy Expenditure (Harris-Benedict) [Online calculator]. TG we-Calculate. https://we-calculate.com/el/calculator/bee-calculator
TG we-Calculate Editorial Team. "BEE Calculator — Basal Energy Expenditure (Harris-Benedict)." TG we-Calculate. 2026. https://we-calculate.com/el/calculator/bee-calculator.
TG we-Calculate Editorial Team, "BEE Calculator — Basal Energy Expenditure (Harris-Benedict)," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/el/calculator/bee-calculator
@misc{wecalculate_bee_calculator, title = {BEE Calculator — Basal Energy Expenditure (Harris-Benedict)}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/el/calculator/bee-calculator}}, year = {2026}, note = {TG we-Calculate} }
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