Health

Benadryl Dosage Calculator

Calculate diphenhydramine dosage by weight and age.

Weight (kg)

Age (years)

Formulation

Recommended Dose—

Amount to Give—

Max Daily Dose—

Frequency—

Pediatric: 1–1.25 mg/kg per dose, every 4–6 hours. Max 300 mg/day for adults, 150 mg/day for children.