Body Surface Area Calculator (5 Formulas)
BSA via Mosteller, Du Bois, Haycock, Gehan–George or Boyd — selectable, with the spread between them shown.
BSA scales drug doses (especially chemotherapy), cardiac index and burn assessment better than weight alone. Mosteller's square-root form became the default because it's mentally computable and agrees with Du Bois within ~2% across normal adult sizes.
Formula
Reference aid for healthcare professionals only. Every result must be independently verified before clinical use. Never use this tool for self-medication or to replace clinical judgement.
BSA via Mosteller, Du Bois, Haycock, Gehan–George or Boyd — selectable, with the spread between them shown. The Body Surface Area Calculator (5 Formulas) is a free, private bsa calculator tool — every result computes instantly in your browser with no sign-up and no data upload.
About Body Surface Area Calculator (5 Formulas)
BSA scales drug doses (especially chemotherapy), cardiac index and burn assessment better than weight alone. It applies Mosteller: BSA = √(height(cm) × weight(kg) ÷ 3600). Use the Body Surface Area Calculator (5 Formulas) to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use Body Surface Area Calculator (5 Formulas)
- 1Enter your details in the Body Surface Area Calculator (5 Formulas) input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use Body Surface Area Calculator (5 Formulas)?
- ✓Instant bsa calculator result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (Mosteller RD, N Engl J Med 1987;317:1098)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the Body Surface Area Calculator (5 Formulas) work?+
BSA scales drug doses (especially chemotherapy), cardiac index and burn assessment better than weight alone. The calculation uses the formula: Mosteller: BSA = √(height(cm) × weight(kg) ÷ 3600). Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the Body Surface Area Calculator (5 Formulas) accurate, and what is it based on?+
The method is traceable to authoritative sources, including Mosteller RD, N Engl J Med 1987;317:1098; Du Bois D & Du Bois EF, Arch Intern Med 1916;17:863-71. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the Body Surface Area Calculator (5 Formulas) free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This is a reference aid for healthcare professionals and must be independently verified. It is not for self-diagnosis or self-medication.
What can I use the Body Surface Area Calculator (5 Formulas) for?+
It's commonly used for bsa calculator, body surface area, mosteller. BSA via Mosteller, Du Bois, Haycock, Gehan–George or Boyd — selectable, with the spread between them shown.
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