Estimate body surface area with the Mosteller formula.
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The Body Surface Area Calculator helps you Estimate body surface area with the Mosteller formula. Enter your own values to get an instant result, then use the graph and table to understand how the inputs affect the answer. Calculations run in your browser and are not sent to CalcifyNow.
Enter Height (cm), Weight (kg). The calculator validates the inputs and updates the answer, chart and breakdown without sending your values to the server.
Mosteller BSA = square root of height(cm) × weight(kg) ÷ 3,600.
The result is recalculated whenever you change an input. Use consistent units throughout and keep the displayed rounding in mind when comparing with another source.
Use the calculator's pre-filled values as a worked example:
Change one value at a time to see how it affects the result, graph and table.
Read the main result together with the supporting values. The graph shows the relationship visually, while the table makes each step easier to inspect.
This calculator cannot account for medical history, diagnosis, medication or every individual factor. It is informational and is not medical advice.
Estimate body surface area with the Mosteller formula.
Have these values ready: Height (cm), Weight (kg). Labels beside each field explain the expected unit or format.
It applies the formula shown on this page. Its accuracy depends on the accuracy of your inputs and the assumptions described below the calculator.
Treat the result as an informational estimate, not a diagnosis. Individual history and circumstances may change how a health measurement should be interpreted.
Use it as an informed estimate, then confirm important decisions with current official information or a qualified professional.
No. The calculation runs locally in your browser. CalcifyNow does not submit your input values to its database.
Report an issue or suggest another calculator. Your calculation values are never submitted.