Body Surface Area (BSA) Calculator

Calculate body surface area using the Mosteller formula.

Aug 31, 2026 Anthropometry #anthropometry #bsa #body-surface-area #chemotherapy-dosing

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All fields required unless noted

Weight (kg)

Height (cm)

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Formula & Clinical Notes

Formula

BSA (m²) = √(Height (cm) × Weight (kg) / 3600)

Clinical Notes

BSA = √(height cm × weight kg / 3600) (Mosteller). Typical adult BSA is 1.6–2.0 m². BSA is used to index cardiac output, glomerular filtration and to dose cytotoxic chemotherapy. The Mosteller formula is accurate for most adult and pediatric body sizes.

Sources

Mosteller (1987) — Simplified calculation of body-surface area