Body Surface Area Calculator

Estimated body surface area (Du Bois formula) — commonly used for medication dosing calculations.

For reference only — any medical dosing must be confirmed by a qualified professional.

Equation used
BSA = 0.007184 × H^0.725 × W^0.425 — Du Bois formula (H in cm, W in kg)

Frequently Asked Questions

Which BSA formula is the main result based on?

The Du Bois formula: BSA = 0.007184 × Height(cm)^0.725 × Weight(kg)^0.425. It's one of the most widely used BSA equations historically, including for medication dosing references.

Why does the calculator also show Mosteller and Haycock results?

Different BSA formulas (Du Bois, Mosteller, Haycock) give slightly different estimates from the same height and weight. Showing all three lets you see how sensitive the estimate is to the formula choice.

Can I use this to calculate my own medication dose?

No — as the note below the result says, this is for reference only. Any medical dosing based on body surface area must be confirmed by a qualified healthcare professional.