Body Surface Area (BSA) is a measurement of the total surface area of the human body. It is widely used in medical practice to determine appropriate drug dosages, assess metabolic mass, and evaluate physiological parameters. Unlike body weight alone, BSA provides a more accurate representation of a patient’s size, which is crucial for treatments like chemotherapy, fluid management, and pediatric care.
Accurate BSA calculations are vital for:
Medication Dosing: Many drugs, especially chemotherapeutic agents, are dosed based on BSA to minimize toxicity.
Clinical Assessments: Helps in evaluating burn severity, cardiac output, and renal function.
Research & Trials: Standardizes measurements in clinical studies for consistency.
Enter Patient Details:
Input height (cm or inches) and weight (kg or pounds).
Select Calculation Method:
Choose from validated formulas like Mosteller (default), Du Bois, Haycock, Gehan & George, or Boyd.
View Results:
Get instant BSA values in square meters (m²) along with comparative results from all methods.
Formula: √(height × weight / 3600)Advantages: Simple, widely accepted, and validated for both adults and children.
Formula: 0.007184 × height<sup>0.725</sup> × weight<sup>0.425</sup>Advantages: Historically significant, often used in older clinical studies.
Formula: 0.024265 × height<sup>0.3964</sup> × weight<sup>0.5378</sup>Advantages: Optimized for pediatric populations.
Formula: 0.0235 × height<sup>0.42246</sup> × weight<sup>0.51456</sup>Advantages: Adjusts for body composition variations.
Formula: Complex logarithmic calculation accounting for mass distribution.Advantages: Useful for extreme weight ranges.
Oncology: Chemotherapy doses are often calculated per m² to balance efficacy and safety.
Critical Care: Guides fluid resuscitation in burns (e.g., Parkland formula).
Pediatrics: Ensures age-appropriate dosing in growing children.
Body Composition: May not account for muscle vs. fat distribution.
Ethnic Variations: Some formulas were derived from specific populations.
Extreme BMI: Accuracy may decrease in obesity or cachexia.
This BSA calculator provides quick, reliable estimates using multiple validated methods. Always consult a healthcare professional for medical decisions. For research, clinical, or educational purposes, this tool ensures precision in body surface area calculations.
Note: Results should complement—not replace—clinical judgment. Different medical specialties may prefer specific formulas based on patient demographics.
Note: Body Surface Area is used in many medical applications including medication dosing and medical indicators. Different formulas may be preferred for different populations (e.g., children vs. adults).
