BSA

Body Surface Area Calculator

The surface area of your body in square metres, by the Mosteller and Du Bois formulas.

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Result…

Units
kg
cm

 

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How it's calculated

Mosteller (1987): BSA = √(height cm × weight kg ÷ 3600)
Du Bois (1916): BSA = 0.007184 × kg^0.425 × cm^0.725
Haycock (1978): BSA = 0.024265 × kg^0.5378 × cm^0.3964

Body surface area is used to dose chemotherapy and some other drugs, and to index heart output to body size. An average adult is about 1.7–1.9 m². The formulas agree closely for typical adults and drift apart at the extremes of size; Haycock was made with children in mind.

Your numbers, step by step

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