Body Surface Area Calculator
Calculate your body surface area using your height and weight with the Mosteller formula.
Calculated instantly in your browser — nothing is sent to or stored on our servers.
How This Is Calculated
Body surface area (BSA) estimates the total surface area of your body. It’s widely used in clinical settings for dosing medications and measurements that scale with body size rather than weight alone.
The Formula
BSA (m²) = √((height(cm) × weight(kg)) ÷ 3600) — the Mosteller formula, one of the most widely used BSA equations.
Where It’s Used
BSA is commonly referenced in medical dosing calculations, burn assessments, and cardiac index measurements — always shown in square meters regardless of your input units.
For general reference only.
This is a general estimate. Medical dosing should always be confirmed by a qualified healthcare professional using clinical-grade methods.
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