Body Surface Area (BSA) Calculator
Calculate your Body Surface Area in square meters using 5 established formulas. BSA is commonly used for medication dosing, calorie calculations, and burn assessment.
How BSA is calculated
Mosteller formula: √(height(cm) × weight(kg) / 3600). Other formulas: Du Bois, Haycock, Gehan & George. Used for medication dosing, burn assessment, and cardiac output standardization.
Frequently asked questions
How accurate are the results?
Formulas used here are validated in population studies but cannot account for individual genetics, body composition, or medical conditions. Treat results as a starting point, not a medical diagnosis.
Should I consult a professional?
If you have specific health concerns, existing conditions, or are planning significant lifestyle changes, consult a qualified healthcare provider (doctor, dietitian, physiologist).
How often should I recalculate?
Recalculate when your weight changes more than 5%, activity level shifts significantly, or every 3-6 months for routine monitoring. Results are snapshots — your body changes daily.
Last updated
For general wellness information only, not medical advice — see our disclaimer.