Back to calculator
Clinical & CardioGenerated accuracy model review: 2026-05-06
Body Surface Area accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Mosteller: √((Ht*Wt)/3600). DuBois: 0.007184 * Wt^0.425 * Ht^0.725
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Height: 175 cm
- Weight: 75 kg
Expected outputs
- BSA (Du Bois): 1.9 m²
- BSA (Mosteller): 1.91 m²
Known limitations
- BSA formulas are estimates derived from population averages. Clinical dosing should always follow strict protocols.
Assumptions
- Both formulas estimate body surface area from height and weight rather than measuring it directly.
- The result is suitable for education and quick reference, but medication dosing should follow the specific protocol in use.
- BSA is a body-size estimate and does not account for edema, amputations, or unusual body composition.
Unit handling
- Height accepts values in cm.
- Weight accepts values in kg.
- BSA (Du Bois) is displayed in m².
- BSA (Mosteller) is displayed in m².
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current body-surface-area-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Body Surface Area.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.