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Body Surface Area (BSA) Calculator

Input

Body Surface Area

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About

Body Surface Area (BSA) is used in medicine for drug dosing (especially chemotherapy), renal clearance normalization, burn assessment, and cardiac index calculation. The Du Bois formula (1916) is the most widely used, while the Mosteller formula offers a simpler calculation. Average adult BSA is approximately 1.7 m² for females and 1.9 m² for males.

Formula

Du Bois: BSA (m²) = 0.007184 × Height (cm)^0.725 × Weight (kg)^0.425
Mosteller: BSA (m²) = √(Height (cm) × Weight (kg) / 3600)

Interpretation

BSA (m²)Interpretation
< 1.5Below average adult
1.5 – 2.2Normal adult range
> 2.2Above average adult

References

  1. Du Bois D, Du Bois EF. A formula to estimate the approximate surface area if height and weight be known. Arch Intern Med. 1916;17:863-871.
  2. Mosteller RD. Simplified calculation of body-surface area. N Engl J Med. 1987;317(17):1098.

FAQ

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Disclaimer

For educational and informational purposes only. Not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional.