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Body Surface Area (BSA)
Multiple validated formulas — essential for chemotherapy dosing and cardiac indices
Du Bois (Default)
—
0.007184 × W^0.425 × H^0.725
Mosteller
—
√(W × H / 3600)
Haycock
—
0.024265 × W^0.5378 × H^0.3964
Gehan-George
—
0.0235 × W^0.51456 × H^0.42246
Normal adult BSA ≈ 1.73 m² — Values within 5% of each other indicate reliable measurement. Mosteller is simplest for bedside calculation.
BSA Formula Comparison
| Formula | Year | Best Use |
|---|---|---|
| Du Bois & Du Bois | 1916 | Most widely cited; standard reference |
| Mosteller | 1987 | Simplest; bedside calculation |
| Haycock | 1978 | Paediatric populations |
| Gehan-George | 1970 | Alternative to Du Bois |
Du Bois: BSA = 0.007184 × W^0.425 × H^0.725
Mosteller: BSA = √(W × H / 3600)
Haycock: BSA = 0.024265 × W^0.5378 × H^0.3964
Gehan-George: BSA = 0.0235 × W^0.51456 × H^0.42246
W in kg, H in cm, BSA in m²
Mosteller: BSA = √(W × H / 3600)
Haycock: BSA = 0.024265 × W^0.5378 × H^0.3964
Gehan-George: BSA = 0.0235 × W^0.51456 × H^0.42246
W in kg, H in cm, BSA in m²
Clinical Uses: Chemotherapy dosing (e.g., cisplatin, doxorubicin at mg/m²), cardiac index (CI = CO/BSA; normal 2.4–4.0 L/min/m²), burn area fluid resuscitation, renal clearance normalisation.
For clinical decision support only. Not a substitute for professional medical judgment.
