Free Body Surface Area Calculator

Calculate BSA using the Mosteller formula, commonly used for medication dosing.

BSA-based dosing is used for some medications (particularly chemotherapy) because it correlates better with metabolic processes than weight alone for certain drugs. This is a reference calculation only — actual medical dosing should always be determined by a qualified healthcare provider.

Frequently Asked Questions

Why is BSA used for medication dosing?
For some drugs, BSA correlates better with metabolic rate and clearance than body weight alone, particularly in oncology.