Body Surface Area Calculator
Body surface area (BSA) is used in nutrition and clinical reference work. This tool shows the Mosteller and Du Bois results side by side.
Enter your details above and the result will appear here.
How to use
- Enter your weight in kilograms.
- Enter your height in centimetres.
- Both BSA formulas appear instantly.
Note
Mosteller: square root of (height x weight / 3600). Du Bois: 0.007184 x height^0.725 x weight^0.425, with height in cm and weight in kg. Estimate only — not medical advice.
Frequently Asked Questions (FAQ)
What is a body surface area calculator?
It estimates your body surface area in square metres from your height and weight using standard reference formulas.
Which formulas does this calculator use?
It shows results from both the Mosteller formula and the Du Bois formula side by side so you can compare them.
Is the result medical advice?
No. The result is an estimate for reference only and is not medical advice.
Is this calculator free?
Yes. It is free, needs no signup, and runs in your browser.