Paracetamol Dosage Calculator

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Adult dosing uses a fixed maximum of 1 g per dose and 4 g per day, but only from 50 kg upward. Anyone under 50 kg, adult or child, is dosed by weight at 15 mg/kg per dose.
Body weight used to calculate the weight-based dose. For children, use current measured weight.
kg
Choose the product you have. Liquid formulations add a volume-in-ml result. Tablet doses are always rounded to the nearest half tablet.
Paracetamol can be given every 4-6 hours, with a maximum of 4 doses in 24 hours. Always leave at least 4 hours between doses.
Recommended single doseWeight-based child dose
300mg

15 mg/kg for children and anyone under 50 kg; 500-1000 mg for adults of 50 kg and over

Maximum single dose400mg
Maximum daily dose1,200mg
Tablet dose1/2 tablet
300 mg
Low dose<250Moderate dose250-500Standard adult500-750Maximum750+

Recommended dose: 300 mg per dose.

  • Recommended dose is 15 mg/kg: 20.0 kg x 15 mg/kg = 300 mg per dose.
  • Give a maximum of 4 doses in 24 hours, always at least 4 hours apart. The 24-hour ceiling is 1200 mg.
  • The single-dose limit and the daily limit are separate: 4 doses of 400 mg would come to 1600 mg, which is above the 1200 mg daily ceiling. Use the 300 mg recommended dose for repeat dosing and never let the 24-hour total pass 1200 mg.

Next stepAlways check the product label for the exact concentration of the liquid you have, as formulations vary. Consult a pharmacist or doctor if the child is under 3 months, has liver disease, or is malnourished.

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