Health & Fitness Calculators
Body Surface Area Calculator
Calculate body surface area (BSA).
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Result
Body surface area (Mosteller)
1.89 m²
About the Body Surface Area Calculator
Body surface area (BSA) is used in medicine to dose certain drugs (like chemotherapy) and gauge metabolic needs. Enter your height and weight and the calculator returns your BSA in square meters using the widely used Mosteller formula. It's a simple, reproducible number that clinicians rely on for accurate, weight-independent dosing.
How to use the Body Surface Area Calculator
- 1Enter your height and weight.
- 2Read the result instantly — it recalculates as you type.
- 3Adjust the numbers to model different scenarios.
Frequently asked questions
What is body surface area used for?
Chiefly medication dosing (especially chemotherapy), cardiac index, and burn assessment — anywhere a size measure more precise than weight is needed.
Which BSA formula is this?
The Mosteller formula: BSA = √(height cm × weight kg ÷ 3600), the most common in clinical use for its simplicity and accuracy.