Calculate Body Surface Area using 5 standard medical formulas: Du Bois, Mosteller, Haycock, Gehan & George, and Boyd. Used for drug dosing and medical assessments.
Body Surface Area (BSA) is the total surface area of the human body. It is used in medicine to calculate drug dosages, chemotherapy dosing, and fluid requirements. Multiple formulas exist because no single formula is perfect for all populations. The Du Bois formula (1916) is the classic standard, while the Mosteller formula (1987) is widely used for its simplicity. All calculations happen in your browser — no data is sent to any server.