Body Surface Area Calculator

Calculate your body surface area (BSA) using different formulas. Used in medicine for medication dosing.

Height (cm)

Weight (kg)

Formula

Body Surface Area

1.81 m²

Using formula: Du Bois

Comparison

Average

Average adult BSA

1.8 m²

Formula comparison

Du Bois1.810 m²

Mosteller1.820 m²

Haycock1.830 m²

Gehan-George1.830 m²

Medical use

BSA is used in medicine to calculate medication doses, especially chemotherapy, and to evaluate cardiac indices.

Chemotherapy dosing

Cardiac index

GFR normalization

What is BSA?

Body Surface Area (BSA) is a measure of the total surface of the human body. It's used in medicine because many physiological processes correlate better with BSA than with weight.

Available formulas

Several formulas exist: Du Bois (oldest and most used), Mosteller (simpler), Haycock (for children), and Gehan-George. All give similar results for adults.

Clinical applications

BSA is used to dose medications (especially chemotherapy), calculate cardiac index, normalize physiological parameters, and evaluate kidney function.