Wellness estimates

Body Surface Area Calculator

Calculate body surface area (BSA) in square meters using height and weight — used in medical dosing and burn area assessment. Use this Health estimates tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
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Result
Explanation
Common questions
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How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

BSA is used to calculate medication doses, especially chemotherapy. The Mosteller formula: BSA (m²) = √(height(cm) × weight(kg) / 3600). The DuBois formula is also commonly used in clinical settings.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

Why is BSA used for drug dosing?

BSA correlates better with cardiac output and organ size than weight alone, making it a more accurate basis for chemotherapy and other high-potency drug dosing.