Body Surface Area (DuBois Formula) Calculator

Summary

Calculate body surface area using the DuBois & DuBois formula from height and weight in metric or imperial units.

How it works

1. Select your preferred unit system — metric (cm / kg) or imperial (ft, in / lb).
2. Enter your height and weight in the input fields.
3. The calculator applies the DuBois formula: BSA = 0.007184 × H^0.725 × W^0.425.
4. The result appears instantly in square meters (m²) along with a normal-range reference.
5. Imperial values are converted to cm and kg internally before the formula runs.

Use cases

• Calculating chemotherapy drug doses that scale with body surface area.
• Estimating cardiac index (cardiac output ÷ BSA) in cardiology.
• Determining adjusted drug doses for patients with unusual body composition.
• Teaching medical students the DuBois formula and its clinical context.
• Cross-checking BSA values from other calculators or clinical references.
• Research and academic exercises comparing BSA estimation methods.

Frequently Asked Questions