Clark's formula is a widely used method to calculate the pediatric dose of a medication based on the weight of the child. The formula is: \[ \text{Child's Dose} = \left( \frac{\text{Weight of child in kg}}{70} \right) \times \text{Adult Dose} \] This method ensures a weight-based adjustment of the adult dose, assuming the average adult weight is 70 kg. It is more accurate than age-based formulas for children, as weight correlates more directly with drug distribution and metabolism.