Calculadora de BSA (Superfície Corporal)

The BSA (Body Surface Area) Calculator estimates the total surface area of the human body using the Mosteller formula. This formula is widely adopted in clinical practice for its simplicity and accuracy, calculated as the square root of height (in cm) times weight (in kg) divided by 3600. The result is expressed in square meters (m²).

BSA calculation is essential in many medical fields, especially oncology for chemotherapy dosing, pharmacology for adjusting narrow therapeutic index drugs, and nephrology for evaluating renal function (glomerular filtration rate). It is also used in hemodynamics to calculate cardiac indices and in burn management to estimate the extent of injury.

To use the calculator, enter your height in centimeters and weight in kilograms. Use current and accurate values. The Mosteller formula is recommended for adults and children over 1 year old, but it does not replace medical evaluation. In patients with significant weight changes (edema, ascites) or amputations, the result may be unreliable.

Important caveats: BSA should not be used alone for clinical decisions. Always consult a healthcare professional. The Mosteller formula correlates well with other formulas (Du Bois, Haycock) but may underestimate BSA in obese individuals or overestimate in very small children. Prefer direct height and weight measurements, avoiding estimates.