Body Surface Area Calculator
Calculate body surface area using multiple validated formulas for medical dosing, cardiac index calculations, and clinical assessments with precision and accuracy.
Body Surface Area Results
BSA Calculation Details:
Formula Comparison:
BMI Classification: Normal Weight
BMI of 22.9 kg/m² indicates normal weight range (18.5-24.9 kg/m²)
BSA Reference Ranges:
About
Our Body Surface Area Calculator provides accurate BSA calculations using multiple validated formulas for medical professionals, researchers, and healthcare applications requiring precise dosing calculations.
Why Choose
Six validated formulas including Du Bois, Mosteller, Haycock, and specialized options for different populations. Real-time calculations with formula comparison and clinical applications.
Features
Multiple BSA formulas, metric and imperial units, BMI calculation, formula comparison, reference ranges, sample medication dosing, and specialized population considerations.
Benefits
Accurate medication dosing, cardiac calculations, burn assessment, research applications, pediatric considerations, and standardized clinical measurements for optimal patient care.
Enter Measurements
Input patient weight and height in metric (kg, cm) or imperial (lbs, ft/in) units. Add age and gender for additional clinical context.
Select Formula
Choose from six validated BSA formulas based on your clinical application: Du Bois (general), Mosteller (simple), Haycock (pediatric), or others.
Apply Results
Use BSA results for medication dosing, cardiac calculations, or research. Compare formulas and reference appropriate clinical guidelines.
Frequently Asked Questions - Body Surface Area Calculator
Du Bois & Du Bois is most widely used in clinical practice. Mosteller is simpler and equally accurate for most applications. Haycock is preferred for pediatric patients. Gehan & George is standard for oncology. Boyd is considered most accurate for research. Choose based on your specific clinical or research needs.
BSA formulas typically have accuracy within 5-10% of measured values. Differences between formulas are usually <5%. All major formulas correlate well with direct measurements. The choice of formula has minimal clinical impact for most applications, but consistency within institutions is important.
BSA correlates better with metabolic processes than weight alone. It's essential for chemotherapy dosing to maximize efficacy while minimizing toxicity. BSA-based dosing accounts for differences in body composition and is more accurate across different body sizes, especially important in pediatrics and oncology.
Average adult BSA: 1.7 m² (range 1.6-2.2 m²). Men typically 1.9 m², women 1.6 m². Pediatric values: newborn 0.25 m², 1-year 0.5 m², 10-year 1.14 m². BSA increases with age until adulthood, then remains relatively stable unless significant weight changes occur.
Use BSA for: chemotherapy, cardiac medications, some pediatric drugs, burn fluid calculations, and research studies. Use weight-based dosing for: most adult medications, antibiotics, analgesics, and when BSA calculations aren't specified. Follow specific drug labeling and institutional protocols.