Body Surface Area Calculator
Calculate Body Surface Area (BSA) using multiple medical formulas. Essential for medical dosage calculations, cardiac index measurements, and clinical assessments.
📏 Patient Measurements
Body Mass Index (BMI)
📊 BSA Calculation Results
Body Surface Area
Formula Comparison
| Formula | BSA (m²) | Difference | Best For |
|---|---|---|---|
| Du Bois | 1.810 | — | General use |
| Mosteller | 1.818 | +0.5% | Quick calculation |
| Boyd | 0.029 | -98.4% | Research |
| Haycock | 1.826 | +0.9% | Pediatrics |
🏥 Clinical Applications
💊 Drug Dosage
Chemotherapy and medication dosing
❤️ Cardiac Index
Heart function assessment
🩺 Burn Assessment
Burn severity calculation
Body Surface Area Calculator - Medical BSA Calculator
Calculate Body Surface Area (BSA) using multiple validated medical formulas. Essential for drug dosage calculations, cardiac output assessments, and various clinical applications in medicine.
🧮 Multiple Formulas
Du Bois, Mosteller, Boyd, and Haycock formulas
📏 Dual Unit System
Support for both metric and imperial measurements
👥 Patient Presets
Quick presets for different patient categories
📊 BMI Calculation
Automatic BMI calculation and categorization
🎯 Step-by-Step Guide:
- Choose Unit System: Select metric (kg/cm) or imperial (lbs/in)
- Enter Height: Input patient height in chosen units
- Enter Weight: Input patient weight in chosen units
- Use Presets: Optional quick presets for common patient types
- View Results: Get BSA calculations using all major formulas
Medical Note:
Du Bois formula is most commonly used in clinical practice
📐 Medical Formulas:
Du Bois Formula (1916)
Most widely used in clinical practice
Mosteller Formula (1987)
Simplified calculation, easier to remember
Boyd Formula (1935)
More complex but potentially more accurate
Haycock Formula (1978)
Commonly used in pediatric medicine
Q: What is Body Surface Area (BSA)?
A: BSA is the measured or calculated surface area of a human body. It's used in medical calculations for drug dosages, cardiac output, and various physiological assessments.
Q: Which formula should I use?
A: Du Bois formula is most commonly used in clinical practice. Mosteller is simpler to calculate. Haycock is preferred for pediatric patients.
Q: Why are BSA calculations important in medicine?
A: BSA is crucial for accurate drug dosing (especially chemotherapy), calculating cardiac index, assessing burn severity, and normalizing physiological measurements.
Q: How accurate are these calculations?
A: These formulas are validated and widely used in medical practice. Differences between formulas are typically small (±5%) for normal body habitus.
Q: What's the normal BSA range?
A: Average adult BSA ranges from 1.5-2.0 m². Children have smaller BSA values, while larger adults may exceed 2.0 m².
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