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Body Surface Area Calculator

Calculate body surface area using Mosteller, DuBois, Haycock and Boyd formulas.

Height

Weight

Unit System

BSA — Mosteller Formula

All Formulas

Average (all 4)

BSA is used in medicine for drug dosing, chemotherapy, and burn assessment. Average adult BSA ≈ 1.7–1.9 m².

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About Body Surface Area Calculator

Our free Body Surface Area Calculator helps you run quick, accurate calculations for everyday financial and mathematical needs with just a few inputs. Calculate body surface area using Mosteller, DuBois, Haycock and Boyd formulas. Enter your values, and the calculator instantly shows detailed results with breakdowns you can understand. No signup, no ads interrupting your workflow — just accurate, reliable calculations you can trust. Works on any device, saves nothing to our servers.

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