Body Surface Area Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter your height in centimetres and weight in kilograms.
- Press Calculate for the body surface area.
How it works
The Mosteller formula estimates body surface area: BSA = √(height in cm × weight in kg ÷ 3600), in square metres. It's used in some medical dosing.
Worked example
180 cm, 80 kg. √(180 × 80 ÷ 3600) = √4 = 2 m².
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Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.