This calculation is determined by using the weight and height of the child and the West Nomogram. Where the weight and height of the child is normal for their age the calculation can be performed using the weight alone. If the child's weight is not in the normal range, the use of the Nomogram is more extensive.

A straight line is drawn between height and weight. The point where the line crosses the surface area column is the estimated body surface area.

Using the West nomogram below calculate the following BSA in square metres for each child of normal height and weight.

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Calculation of Drug Dosages, 7th Edition Ogden, Sheila J

Nomogram image, p. 364, Copyright Elsevier for C4203 - Certificate IV in Nursing. 2005