This pediatric dosage calculator computes weight-based doses for common medications. Pediatric dosing requires precise weight-based calculations to ensure efficacy and avoid toxicity.
Calculate Pediatric Dose
How to Use the Pediatric Dosage Calculator
This pediatric dosage calculator provides weight-based dose ranges for common medications. Enter the child's weight and select the medication to see the recommended dose range and maximum limits.
Important Safety Notes
Always use actual body weight (not estimated). For obese children, some medications use ideal body weight. Maximum doses apply regardless of how heavy the child is — never exceed them. Always confirm doses against current prescribing information, formulary references (e.g., Lexicomp, Epocrates), or with a clinical pharmacist.
Units and Concentrations
Liquid formulations come in different concentrations — always check the concentration label before measuring a dose. For example, children's acetaminophen is commonly 160 mg/5 mL, but adult formulations may be 500 mg/tablet. Never use adult formulations for children without dose adjustment.
FAQ
Is this pediatric dosage calculator free?
Yes, completely free with no signup required. Always verify doses against current prescribing information.
How is pediatric dosing calculated?
Most pediatric medications are dosed by weight in mg/kg. Multiply the child's weight in kg by the dose per kg (e.g., acetaminophen 15 mg/kg × 20 kg = 300 mg). Maximum doses apply regardless of weight.
What is the maximum dose for acetaminophen in children?
Acetaminophen for children is dosed at 10-15 mg/kg every 4-6 hours, with a maximum of 75 mg/kg/day or 4000 mg/day (whichever is lower). Do not exceed 5 doses in 24 hours.
What is the maximum dose for ibuprofen in children?
Ibuprofen for children is dosed at 5-10 mg/kg every 6-8 hours, with a maximum single dose of 400 mg and maximum daily dose of 40 mg/kg/day or 2400 mg/day. Not recommended for infants under 6 months.
Why are pediatric doses calculated by weight?
Children have different body composition, organ maturity, and metabolic rates than adults. Weight-based dosing accounts for these differences to deliver effective drug concentrations while minimizing toxicity risk.