About the Body Surface Area Calculator
Find your body surface area (BSA) with two common formulas. This tool is free, works in your browser and needs no sign-up.
How to use the Body Surface Area Calculator
Enter your height in centimetres and your weight in kilograms.
Formula used
Mosteller: BSA = √(height × weight ÷ 3600). DuBois: BSA = 0.007184 × weight^0.425 × height^0.725.
Example
With Height (cm) 175, Weight (kg) 70, the calculator shows: Mosteller = 1.845 m²; DuBois = 1.848 m².
Frequently asked questions
Is the Body Surface Area Calculator free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the Body Surface Area Calculator?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.