Body Surface Area Calculator
Body Surface Area Calculator
Accurate BSA Calculation
Precisely calculates body surface area using multiple medical formulas (Mosteller, Du Bois, etc.) with automatic unit conversions for reliable results.
Medical Applications
Essential for determining correct drug dosages, chemotherapy treatments, and nutritional requirements based on individual body size.
For All Ages
Works for men, women, and children with special considerations for pediatric growth tracking and age-specific health recommendations.
FAQ: Frequently Asked Questions
What is Body Surface Area ?
Body Surface Area measures the total surface area of a human body. It’s more accurate than body weight alone for medical purposes because it considers both height and weight. Doctors use BSA to calculate proper drug dosages, especially for chemotherapy, antibiotics, and other medications where precise dosing is critical. BSA also helps assess burns, metabolic rate, and kidney function. The average adult BSA is about 1.7 m².
How accurate are online BSA calculators?
Online Body Surface Area provide good estimates when you enter accurate measurements. They use validated mathematical formulas developed through medical research. However, for critical medical decisions, healthcare professionals may use more precise methods. The accuracy depends on the formula used Mosteller is common for general use, while Du Bois might be preferred in clinical settings.
What's the difference between BMI and BSA?
BMI (Body Mass Index) and Body Surface Area both use height and weight but serve different purposes. BMI estimates body fat and categorizes weight status (underweight, normal, overweight). Body Surface Area, important for medical dosing and treatments. A tall, lean person might have high BSA but normal BMI. BMI is simpler (weight/height²) while BSA formulas are more complex.
Which BSA calculation formula is the best?
The “best” formula depends on the purpose. The Mosteller formula is simplest and widely used. Du Bois is considered very accurate but more complex. Haycock works well for children. Most calculators default to Mosteller as it’s easy to calculate and sufficiently accurate for most needs. Medical professionals might choose specific formulas based on patient characteristics or institutional protocols.
How often should I calculate my BSA?
Can BSA help with weight loss tracking?
Why do some medications use BSA for dosing?
How does BSA change with age?
Can I use BSA to compare myself to others?
While interesting, BSA comparisons have limited value because bodies vary naturally. Taller people have higher BSA, but this doesn’t indicate health status. More important is whether your BSA is appropriate for medical dosing if needed. Focus on health metrics like blood pressure, cholesterol, and fitness level rather than comparing BSA to others. Your doctor can interpret your BSA in context.
