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About This Tool
The Body Surface Area (BSA) Calculator estimates the total surface area of your body using the Du Bois and Du Bois formula (1916). BSA is frequently used in medicine to calculate drug dosages, determine cardiac output, and assess burn injuries.
The Du Bois formula is: BSA (m²) = 0.007184 × Height(cm)^0.725 × Weight(kg)^0.425. This is one of the most widely used and validated formulas for BSA estimation, used in clinical settings worldwide.
Average adult BSA ranges from about 1.7 to 2.0 m². BSA-based dosing is particularly important for chemotherapy drugs and certain antibiotics where precise dosing relative to body size improves efficacy and safety.