Body Surface Area Calculator
BSA by Mosteller, DuBois and Haycock formulas.
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The three formulas agree within about 2–3% for most adults. Mosteller is the most commonly used.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Body Surface Area Calculator do?
BSA by Mosteller, DuBois and Haycock formulas. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: bsa for chemotherapy dosing; skin surface area; cardiac index body size.