Paracetamol (Acetaminophen) Dose Calculator
Enter weight and product strength to estimate a typical dose range of 10–15 mg/kg per dose.
How to use this paracetamol dose per kg calculator
This calculator helps you estimate a weight-based paracetamol dose. In many clinical references, a typical dose is 10 to 15 mg per kilogram per dose, usually every 4 to 6 hours as needed. The tool also estimates liquid volume in mL and tablet equivalents based on the formulation you enter.
Standard dosing guidance (general references)
Per-dose recommendation
- Typical range: 10–15 mg/kg per dose
- Dosing interval: every 4–6 hours
- Maximum frequency: usually no more than 5 doses in 24 hours
Maximum daily dose
- Weight-based ceiling: 75 mg/kg/day
- Absolute ceiling often used in adults: 4000 mg/day
- Some clinicians prefer a lower adult ceiling (for example 3000 mg/day), especially for long-term self-use.
Example weight-based doses
| Weight | 10 mg/kg dose | 15 mg/kg dose | At 160 mg/5 mL (approx range) |
|---|---|---|---|
| 10 kg | 100 mg | 150 mg | 3.1 to 4.7 mL |
| 15 kg | 150 mg | 225 mg | 4.7 to 7.0 mL |
| 20 kg | 200 mg | 300 mg | 6.3 to 9.4 mL |
| 30 kg | 300 mg | 450 mg | 9.4 to 14.1 mL |
Important safety reminders
- Check all medicines for hidden acetaminophen/paracetamol to avoid accidental overdose.
- Use a proper oral syringe for liquid dosing (not a kitchen spoon).
- Do not combine multiple products containing paracetamol unless advised by a clinician.
- If symptoms persist, or fever/pain is severe, seek medical advice.
- In case of possible overdose, seek urgent care immediately.
Frequently asked questions
Is paracetamol and acetaminophen the same medicine?
Yes. “Paracetamol” and “acetaminophen” are two names for the same active ingredient.
Can I dose by age only?
Weight-based dosing is generally more accurate, especially in children. If only age-based charts are available, use them carefully and confirm concentration before giving any dose.
Why does this calculator show a range instead of one number?
Clinical dosing is often expressed as a range (10–15 mg/kg). Your prescriber may choose where within that range to dose depending on age, symptoms, and overall clinical context.
Medical disclaimer
This page is for educational use and does not replace professional medical advice. Dosing guidance can vary by country, product formulation, and patient-specific conditions (such as liver disease, dehydration, malnutrition, or chronic alcohol use). Always confirm with your doctor or pharmacist when in doubt.