Body Surface Area (BSA) is a measure of the total surface area of the human body. While it may seem like an abstract metric, it is frequently used in clinical settings, particularly for calculating drug dosages, especially for chemotherapy and other sensitive treatments. A more accurate dosage can be determined based on BSA rather than body weight alone, as it better correlates with metabolic rate. This calculator uses the Mosteller formula, one of the most common and simplest methods, to give you an accurate BSA estimation.