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Child Dosage Calculator
Calculate the weight-based single dose and daily maximum of common paediatric medicines — paracetamol, ibuprofen, amoxicillin.
Recommended: 10–15 mg/kg per single dose
Optional — e.g. paracetamol syrup 24 mg/mL, ibuprofen syrup 20 mg/mL.
every 6 h · 4 doses/day
Important: this is not medical advice. Paediatric dosing must be confirmed by a licensed clinician or pharmacist.
| Drug | Single dose | Daily max | Interval |
|---|---|---|---|
| Paracetamol | 10–15 mg/kg | 60 mg/kg | every 6 h |
| Ibuprofen | 7–10 mg/kg | 30 mg/kg | every 8 h |
| Amoxicillin | 7–15 mg/kg | 90 mg/kg | every 8 h |
Frequently Asked Questions
How is paediatric dose calculated?+
The standard formula is dose (mg) = body weight (kg) × mg per kg. Paracetamol uses 10–15 mg/kg per single dose, ibuprofen 7–10 mg/kg. These come from paediatric prescribing references.
How many mL of syrup should I give?+
Volume (mL) = dose (mg) ÷ concentration (mg/mL). Example: 300 mg paracetamol at 24 mg/mL = 12.5 mL of syrup.
What is the maximum daily dose?+
Paracetamol: max 60 mg/kg/day (or 4 g for older children). Ibuprofen: max 30 mg/kg/day (or 2.4 g). Amoxicillin: 20–90 mg/kg/day depending on indication.
From what age are these drugs appropriate?+
Paracetamol: from birth (with adjusted dosing). Ibuprofen: from 3 months and ≥5 kg. Amoxicillin: from birth with paediatric adjustment. For infants under 3 months always consult a clinician.
What should I do in case of accidental overdose?+
Call poison control or emergency services immediately. Paracetamol overdose can cause severe liver damage even when initial symptoms are absent.
Does this calculator replace medical advice?+
No. The calculator is a plausibility tool. The final dose must always be confirmed by a licensed clinician or pharmacist.
Background
Child Dosage Calculator — Safe Weight-Based Paediatric Dosing
7 min