Body Surface Area Calculator
Estimate your body surface area (BSA).
Result
Results are estimates for general information only and are not professional advice.
Body surface area
Body surface area is used in medicine to calculate drug doses and other measures. This calculator uses the Mosteller formula — √(height × weight ÷ 3600) — to estimate BSA in square meters.
Frequently Asked Questions
What is the Body Surface Area Calculator?
Estimate your body surface area (BSA). It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Body Surface Area Calculator?
The Body Surface Area Calculator asks for the following values (2): Weight (kg), Height (cm). Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the Body Surface Area Calculator?
The Body Surface Area Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Body Surface Area Calculator free, and do I need an account?
Yes. The Body Surface Area Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.