Body Surface Area Calculator
Calculate body surface area with the Du Bois and Mosteller formulas used for clinical dosing.
Inputs
Formula
- Mosteller: √(h × w / 3600)
- Du Bois: 0.007184 × h^0.725 × w^0.425
BSA scales better than body weight for many drug doses and for cardiac output, which is why hospitals use it. Mosteller is the simple square-root version; Du Bois is the older reference standard.
Step-by-step calculation
- 1
Mosteller
√(h·w/3600)
1.83 m²
Frequently asked questions
What does the Body Surface Area Calculator do?
Calculate body surface area with the Du Bois and Mosteller formulas used for clinical dosing. The Body Surface Area Calculator on OneCalcApp returns the result instantly as you type, together with the formula and the substituted values.
How do I use the Body Surface Area Calculator?
Enter your values in the input fields, choose the relevant units or options, and the Body Surface Area Calculator recalculates automatically. You can copy, print or export the result.
Is the Body Surface Area Calculator free to use?
Yes. The Body Surface Area Calculator is completely free, needs no sign-up and has no usage limit on OneCalcApp.
How accurate is the Body Surface Area Calculator?
It uses the standard formula Mosteller: √(h × w / 3600) and full double-precision arithmetic, so results match a manual calculation to the displayed number of digits.
Does the Body Surface Area Calculator work on mobile and offline?
Yes. The Body Surface Area Calculator runs entirely in your browser on phones, tablets and desktops, and your inputs never leave your device.
Where can I find related tools?
OneCalcApp hosts 300+ calculators and converters, including the full Health collection. Related tools are linked at the bottom of every page.
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