Pedemy All toolsEnter the weight, then pick the age. Doses show in mg and in mL for common liquid strengths. Tap any earlier answer to change it.
This calculator gives weight-based acetaminophen (paracetamol) and ibuprofen doses for children with fever or pain. After you enter a weight and choose an age group, it shows each dose in mg and in mL for common liquid strengths, so it can be used to write a prescription or to explain doses to families.
The tool asks two questions: the child's age (under 3 months, 3–5 months, 6 months to 11 years, or 12 years and older) and whether the medicine is for fever or pain. Acetaminophen is 15 mg/kg every 4–6 hours, no more than 5 doses in 24 hours, with a maximum of 1 g per dose and 75 mg/kg/day (4 g/day). Ibuprofen is 10 mg/kg every 6–8 hours with food, maximum 400 mg per dose and 40 mg/kg/day, and is only offered from 6 months. Under 3 months, fever is flagged for urgent medical review rather than home dosing.
Results include a parent dosing chart by weight band for acetaminophen 160 mg/5 mL and ibuprofen 100 mg/5 mL, safety advice (no aspirin under 18 years, no routine alternating), and reasons to seek care now. The guidance is based on the AAP clinical report on fever and antipyretic use (Pediatrics 2011), AAP HealthyChildren.org dosing tables and FDA labeling.
The tool uses 15 mg/kg per dose every 4–6 hours, no more than 5 doses in 24 hours, with a maximum of 1 g per dose and 75 mg/kg/day (4 g/day). It converts the dose to mL of the 160 mg/5 mL liquid.
The tool offers ibuprofen from 6 months of age. The dose is 10 mg/kg every 6–8 hours with food, maximum 400 mg per dose and 40 mg/kg/day. Under 6 months it suggests acetaminophen only. It advises avoiding ibuprofen in dehydration, kidney disease or chickenpox.
The tool advises against alternating or combining them routinely, because it raises the chance of dosing errors. It suggests choosing one, treating the child's discomfort rather than the number on the thermometer, and checking cold and flu products for hidden acetaminophen.
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