Body Surface Area (BSA) Calculator

Clinical Body Surface Area Guide

Body Surface Area (BSA) is a measure of the total surface of the human body, typically measured in square meters ($m^2$). In medicine, BSA is considered a superior indicator of metabolic mass compared to raw body weight.

Why use BSA instead of Weight?

Weight alone can be misleading when dosing medications with a narrow therapeutic window. BSA provides a better approximation of cardiac output and renal function, ensuring that critical treatments like chemotherapy are both effective and safe.

Key Formulas

• Mosteller: Standardized for both adults and children.
• Du Bois: Historically used for metabolic research.