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Body Surface Area Calculator

Calculate body surface area (BSA), used to dose some medicines.

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Body Surface Area

Clinical medical surface estimation

About the Body Surface Area Calculator

Calculate body surface area (BSA), used to dose some medicines.

How to use the Body Surface Area Calculator

  1. Enter your Height (cm) and Weight (kg).
  2. Press Solve BSA.

Formula and method

Mosteller formula: BSA (m²) = √(height (cm) × weight (kg) ÷ 3600)

Worked example

170 cm and 70 kg give √(11,900 ÷ 3,600) = 1.82 m².

Tips

  • Doctors decide medicine doses. Do not use this tool to adjust medication yourself.

Frequently asked questions

What is the average adult BSA?
About 1.7 m² for adults, often quoted as 1.9 m² for men and 1.6 m² for women.