Body Surface Area Calculator
Compute body surface area with four formulas (Mosteller, Du Bois, Haycock, Gehan & George) for medication dosing and physiology. Get m² from height and weight — free, local, informational only.
How to Use the Body Surface Area Calculator
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Frequently Asked Questions
What is BSA used for?
Drug dosing (especially chemotherapy), burn assessment, and cardiac index — where body size scales treatment. Average adults land near 1.7–1.9 m².
Du Bois formula?
0.007184 × weight^0.425 × height^0.725 — the clinical standard for a century. The tool computes it exactly, alongside Mosteller, Haycock, and Gehan & George plus their average: 70 kg / 170 cm reads 1.82 / 1.81 / 1.83 / 1.83, averaging 1.82 m².
Medical advice?
No — informational only. Dosing decisions belong to clinicians with full patient context.
Do BSA figures upload?
No — math runs locally in your browser. Health data never leaves your device.
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Last updated October 2026