Body Surface Area Calculator
Calculate your body surface area (BSA) using the Mosteller formula. Relevant for sweat rate calculations and some medical dosing contexts.
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How the Body Surface Area Calculator works
Body surface area is calculated from height and weight using the Mosteller formula: BSA = √(height(cm) × weight(kg) / 3600). The Du Bois formula is also available for comparison.
Frequently asked questions
Why does body surface area matter for runners?
BSA is used in some advanced sweat rate and thermoregulation calculations. Runners with a higher BSA relative to body mass generally dissipate heat more efficiently.