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children's Nurofen dosage calculator — ibuprofen dose by weight

enter your child's weight, age, and which Children's Nurofen product you have. we'll calculate the correct single dose (mg and mL), the 24-hour maximum, the minimum interval, and check for situations where ibuprofen isn't safe (dehydration, asthma).

last verified: 23 April 2026

kg

ibuprofen is only suitable for children 5 kg and above.

months

ibuprofen is only suitable from 3 months. for younger babies, use paracetamol.

check the label — 100 mg/5 mL is the 1-7 years suspension, 200 mg/5 mL is the 7-12 years suspension. wrong product = wrong mL dose.

before dosing, tell us:

this calculator provides estimates based on published government rates and formulas. your actual entitlement may vary based on your full circumstances. always check with Services Australia for a precise figure.

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how the dose is calculated: ibuprofen 10 mg per kg of body weight per dose, maximum 400 mg per single dose. interval 6-8 hours, maximum 3 doses per 24 hours. capped at 1200 mg per 24 hours. minimum age 3 months, minimum weight 5 kg.

sources: RCH Melbourne Clinical Practice Guidelines, NPS MedicineWise.

poisons emergency: Poisons Information Centre 13 11 26 (Australia-wide, 24 hours).

this tool provides a calculated estimate based on published dosing guidance. it is not a substitute for advice from your GP or pharmacist. always read the label on your specific product before dosing.