BSA Calculator
Use the BSA Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “bsa calculator”, enter the matching values and units below and review the stated assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
Body surface area uses the Mosteller relation: BSA = √(height in cm × weight in kg ÷ 3,600).
Worked example
Worked example: Inputs: Height: 170 cm; Weight: 70 kg. Outputs: Mosteller body surface area: 1.818119 m².
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
- Review the assumptions and any warnings shown with the result.
Sources
- Metabolism: Body surface area in normal-weight, overweight, and obese adultsReference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
Related calculators
Frequently asked questions
How does the BSA Calculator work?
Body surface area uses the Mosteller relation: BSA = √(height in cm × weight in kg ÷ 3,600).
What should I enter?
Height, Weight
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · health-bsa-v1 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team