Precision mg/kg dosing for safer pediatric care. Enter your child's weight to calculate an accurate, weight-based liquid medication dose in seconds.
Always verify with a pharmacist or pediatrician before administering. Use a calibrated oral syringe — never a household spoon.
⚠️ Clinical Disclaimer
This tool provides standardized mathematical calculations based on widely accepted pediatric dosing guidelines. It is for informational and educational purposes only and does NOT constitute medical advice. It does not account for a child's medical history, allergies, organ function, or contraindications. Always consult a pediatrician or licensed pharmacist before administering any medication to a child. In a medical emergency, contact your local emergency services immediately.
Children are not simply small adults. Their bodies metabolize medications at rates that are directly tied to body mass — not age. A 5-year-old in the 10th weight percentile (~16 kg) requires a fundamentally different dose than a 5-year-old in the 90th percentile (~25 kg). Administering the same "age-appropriate" dose to both children means one is under-dosed and one is potentially over-dosed.
The American Academy of Pediatrics (AAP) and the FDA both endorse weight-based (mg/kg) dosing as the gold standard for pediatric pharmacotherapy precisely because it accounts for this variability. Our calculator applies these same standardized formulas — the same ones used in clinical settings — to give caregivers a precise, evidence-based starting point.
Research published in Pediatrics found that over 80% of pediatric liquid medication errors are linked to measurement inaccuracies — and the most common culprit is the kitchen spoon. A standard teaspoon can hold anywhere from 2.5 mL to 7.3 mL depending on its shape, meaning a caregiver using a tablespoon by mistake could deliver nearly 3× the intended dose.
The solution is straightforward: always use a calibrated oral syringe (available at any pharmacy, often free) and always calculate the dose by weight before drawing it up. This calculator gives you the exact mL volume to draw — eliminating the guesswork entirely.
In the interest of full clinical transparency, here are the standardized dosing ranges this calculator is based on. These are consistent with AAP guidelines and widely published pediatric formularies.
Acetaminophen
(Tylenol)
Do not use in infants under 2 months without physician guidance.
Ibuprofen
(Advil / Motrin)
Not recommended for infants under 6 months.
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