Body Surface Area (BSA) Calculator
Calculator ToolsBSA by the Mosteller and DuBois formulas
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History
All history →Body Surface Area (BSA) Calculator — at a glance
Get your body surface area in square metres.
170 cm
70 kg
Calculate BSA
BSA m²
How to use it — step by step
Height in centimetres and weight in kilograms.
1
Enter your values
Fill in the fields. Default numbers are shown so you can see how it works.
2
Press Calculate BSA
The answer appears at once as large result cards.
3
Copy or share
Copy the result, or share a link that opens with your numbers filled in.
Pro tips
Small things that make the result better.
✦Mosteller is the most used formula.
✦Medicine doses must come from a doctor.
✦Use measured, not estimated, values.
Quick facts
Freeno signup
Privateruns in your browser
Instantresult in a second
No limituse it as often as you like
Frequently Asked Questions
What is BSA used for?+
Doctors use it to scale some medicine doses and to compare heart and kidney measures.
Can I use it to dose medicine?+
No. Doses must be decided by a doctor or pharmacist.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.
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