Body Surface Area Calculator
Estimate body surface area (BSA) from height and weight using Du Bois.
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Frequently asked questions
It uses the Du Bois formula: BSA = 0.007184 × height (cm)^0.725 × weight (kg)^0.425. This is one of the most commonly cited BSA formulas.
A typical adult BSA falls roughly in the range 1.5 to 2.1 m². The exact value depends on height and weight, and tracks differently from BMI for very tall or very short people.
BSA is referenced in clinical contexts to scale measurements by body size, and is sometimes used as a complement to BMI. This calculator gives you an estimate — confirm with a clinician for medical use.
Last updated 2026-06-03.