Pediatric Dose Calculation: 4 Essential Rules & Formulas

1. Young’s rule: Used to calculate doses for children 2 to 12 years old.

$$DOSE = \frac{age (years) +12}{ 20} × adult dose$$

2. Clark's rule: The Clark's rule is used for children 1-12 years of age.

$$DOSE = \frac{weight(Kg)}{ 25} × adult dose$$

3. Fried’s rule: The doses are calculated using the Fried's rule for infants and children < 1 year of age.

$$DOSE= \frac{age (months)}{150} × adult dose$$

4. Body weight-based calculation: The bodyweight-based calculation method considers the weight of the child to calculate the dose.

$$DOSE = \frac{weight(Kg)}{70} × adult dose$$