How to use the Body Surface Area Calculator
Estimate body surface area from body weight, height with the Body Surface Area Calculator. Use it to understand an educational estimate and the inputs behind it, not as a diagnosis or treatment decision.
Step by step
- For the Body Surface Area, enter body weight, height, formula. Keep each value in the unit displayed beside its field.
- Review the selected Body Surface Area workflow and inputs, then read body surface area in the result panel.
- Change one Body Surface Area assumption at a time to compare scenarios. Use Reset to restore this tool's worked example values.
How the calculation works
Mosteller, Du Bois, Haycock, and Gehan–George body-surface-area equations.
Worked example
In the Body Surface Area worked example, body weight 75 kg, height 175 cm, formula Mosteller produces body surface area of 1.909 m². Formula comparison for clinical reference. Review the displayed units before comparing the result.
Understanding the result
The Body Surface Area reports body surface area. Use it to understand an educational estimate and the inputs behind it, not as a diagnosis or treatment decision. Educational estimate only; it cannot diagnose a condition or replace advice from a qualified health professional.
How to check the answer
Check the Body Surface Area estimate by confirming the units and supported ranges for body weight, height, formula. Compare body surface area with another published method or direct measurement when available, and ask a clinician before using it for a health decision.
Common questions
What does the Body Surface Area calculate?
Estimate body surface area from body weight, height with the Body Surface Area Calculator.
Which Body Surface Area inputs have the biggest effect?
body surface area responds directly to body weight, height, formula. Change one input while holding the others constant to see its effect.
Is the Body Surface Area result exact?
Educational estimate only; it cannot diagnose a condition or replace advice from a qualified health professional. Recheck body weight, height, formula and use body surface area only for a decision where that level of precision is appropriate.