Body Surface Area Calculator
BSA by Mosteller, Du Bois and Haycock formulas.
Enter your values
ⓘ Live results
Results
- BSA (Mosteller)
- 1.845 m²
- BSA (Du Bois)
- 1.848 m²
- BSA (Haycock)
- 1.847 m²
Working
- 1Mosteller: √(175 × 70 ÷ 3600) = 1.845 m²
Quick answer
Body surface area is used for chemotherapy dosing and cardiac index; the Mosteller formula is √(height cm × weight kg ÷ 3600).
BSA = √(cm × kg ÷ 3600)
How to use the Body Surface Area Calculator
- 1Choose your units.
- 2Enter weight and height.
- 3Compare the three standard formulas.
Worked example
Using the values the calculator loads with:
Inputs
- UnitsMetric (kg, cm)
- Weight70
- Height175
Results
- BSA (Mosteller)1.845 m²
- BSA (Du Bois)1.848 m²
- BSA (Haycock)1.847 m²
- Mosteller: √(175 × 70 ÷ 3600) = 1.845 m²
Frequently asked questions
Which formula do hospitals use?
Mosteller is the most common because it is simple and agrees closely with Du Bois across normal ranges.
Why is BSA used for dosing?
It correlates better with metabolic rate and blood volume than weight alone, which matters for narrow-therapeutic-index drugs.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.