The doctor has ordered an antibiotic on 11 y/o Billy. The average
adult dose is 250 mg. In order to calculate pediatric doses you must first
determine Billy's body surface area (BSA). Billy is 157.5 cm in height and
weighs 45 kg. Using the example below, plug in the numbers into the
calculator to determine Billy's BSA.

Using the calculator, Billy's BSA is determined as 1.42 M^{2}.

Formula

kg^{0.425} x cm^{0.725} x 0.007184 =
BSA

The above formula is just one method for
determining BSA. Results with other formulas will vary.