Health & Fitness

Body Surface Area Calculator

Calculate BSA using the Du Bois formula

Last reviewed: How we build & verify
cm
kg

Du Bois & Du Bois (1916). Height in cm (30-272) and weight in kg (1-500). For drug dosing (e.g. chemotherapy) use your institution's protocol and dosing weight; this is not medical advice.

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Frequently Asked Questions

No. Body Surface Area is free, with no signup required, and nothing you enter leaves your browser.

Body Surface Area is built on published formulas and reference ranges from established health sources. We revisit it periodically as guidance evolves; the "Last reviewed" date above shows when that last happened. If something looks wrong, tell us with the feedback button in the bottom-right corner.

Body Surface Area Calculator | ExaCalc