Body Surface Area (BSA) Calculator
Calculate body surface area using Mosteller, DuBois, Haycock, and Gehan-George formulas for drug dosing and clinical assessments.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Average adult BSA: female ~1.6 m²; male ~1.9 m²; chemotherapy dosing per BSA m²; neonates ~0.2 m²
Results
Mosteller BSA
210.64sq ft
≈ 29 sheets of paper
How to Use This Calculator
- Enter patient height in cm and weight in kg.
- Review BSA by Mosteller, DuBois, Haycock, and Gehan-George formulas (m²).
- Use the Mosteller formula for most dosing contexts — it is the most widely validated.
How the result changes with Height
| Height | Mosteller BSA |
|---|---|
| 52 | 1.01m² |
| 107 | 1.44m² |
| 173 | 1.83m² |
| 228 | 2.11m² |
What each input means
- Height
- Patient height in centimeters.
- Weight
- Patient weight in kilograms. BSA is used for chemotherapy dosing (mg/m²), burn assessment, and cardiac output indexing. Average adult BSA: ~1.7 m² (Mosteller formula: BSA = √(H×W/3600)).
How this is calculated
Worked example, using the default values
- Identify Input ParametersHeight = 170, Weight = 70 = 2 input(s) provided
- Calculate Mosteller BSAMosteller BSA1.818 = 1.818
- Calculate DuBois BSADuBois BSA1.81 = 1.81
- Calculate Haycock BSAHaycock BSA1.826 = 1.826
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