Body Surface Area (BSA) Calculator

Body Surface Area (BSA) Calculator

Body surface area (BSA) is the total surface area of the human body and is often a more accurate basis than weight for medication dosing — especially chemotherapy — and for indexing physiological measures like cardiac output. This calculator estimates BSA from your height and weight using the two most common equations, Mosteller (the simple square-root formula) and Du Bois, and shows their average. It is for information only; clinical dosing must be confirmed by a healthcare professional.

Body surface area (BSA) is widely used in medicine to dose chemotherapy and other drugs and to index cardiac output. This is an estimate — clinical decisions should always be made by a healthcare professional.