Body Surface Area (BSA) Calculator
Calculate BSA using multiple medical formulas for accurate dosing and research
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m² (square meters)
🛠️ How to Use the BSA Calculator
- Select your preferred height and weight units
- Enter your height and weight accurately
- Choose a formula (Mosteller is recommended for general use)
- Click “Calculate” to see your Body Surface Area (BSA)
- Save, print, or share your result for medical or academic use
📖 What is Body Surface Area (BSA)?
Body Surface Area (BSA) is the calculated surface area of a human body, commonly used in medical dosing, IV fluid management, and assessing metabolic function. BSA provides a more accurate basis for medical calculations than weight alone.
📌 Why Use BSA Instead of BMI?
- BSA is more accurate for determining drug dosages
- Unlike BMI, BSA considers both weight and height to assess surface area and metabolic needs
- Essential for chemotherapy dosing and cardiac output calculations
- Used in pediatric medicine for more precise treatments
📊 Comparison of Common Formulas
| Formula | Accuracy Level | Common Use Case |
|---|---|---|
| Du Bois | High | Medical dosing, most widely accepted |
| Mosteller | Widely used | Simple and quick estimate |
| Haycock | Pediatric use | Children-specific dosing |
| Gehan & George | Research | Clinical and lab settings |
| Boyd | Obesity cases | Accounts for weight scale variations |