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Body Surface Area Calculator

Estimate body surface area for educational reference.

ResultEstimated body surface area: 1.82 m²

Uses the Mosteller equation. Clinical dosing decisions require professional verification.

How to use this calculator

  1. Enter weight in kilograms and height in centimetres.
  2. Review the live result and use Copy result when you need to share it.

How the calculation works

The Mosteller equation takes the square root of height times weight divided by 3,600.

Formula

The Mosteller equation takes the square root of height times weight divided by 3,600.

Step-by-step calculation

  1. Enter weight in kilograms and height in centimetres.
  2. The Mosteller equation takes the square root of height times weight divided by 3,600.
  3. Check the displayed result, then copy it if needed.

Worked example

At 70 kg and 170 cm, estimated BSA is about 1.82 m².

Risk guidance

Frequently asked questions

Does this tool send my inputs anywhere?

No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.

How should I use the result?

Check that the entered units and values match your situation, especially around dates, breaks, and rounding.

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