You’re inCalculator corner
10 free questionsFull Pass $29 · one time
Calculator corner · Study guide

Body Surface Area Calculator

Calculate body surface area with the Mosteller and Du Bois formulas. Free nursing calculator with a worked example.

Use calculator

What it does

Estimates body surface area, used for chemotherapy and other weight-and-height based dosing, by both common methods.

The formulas

Mosteller = √(height cm × weight kg ÷ 3600). Du Bois = 0.007184 × height^0.725 × weight^0.425.

Worked example

A patient 170 cm and 70 kg: Mosteller 1.82 m², Du Bois 1.81 m².

Good to know

The two methods agree closely for most adults; Mosteller is the easier one to do by hand.

Open the interactive calculator

Sources and study limits