Body Surface Area Calculator
Body Surface Area (BSA) is used for chemotherapy dosing, IV fluid calculations, and pediatric medications. Mosteller formula is standard.
Body Surface Area Calculator (Mosteller)
Mosteller formula
BSA (m²) = √(height(cm) × weight(kg) / 3600)
Source: Mosteller RD. Simplified calculation of body-surface area. N Engl J Med. 1987;317(17):1098.
Medical disclaimer: This tool provides educational information for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your individual situation with a qualified healthcare provider.
Frequently asked questions
Why is BSA used for chemotherapy dosing?
Chemotherapy drugs typically dose by BSA because it correlates better than weight alone with metabolic processes that determine drug distribution and clearance.
Are there alternative BSA formulas?
Yes: Du Bois (older), Haycock (pediatric), Boyd (older). Mosteller is preferred for simplicity and accuracy in adults and children.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.