Infant Tylenol (Acetaminophen) Dosage Calculator

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Weigh your child on a calibrated scale for the most accurate dose.
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The American Academy of Pediatrics recommends 10-15 mg/kg per dose. Use 15 mg/kg for higher fever or more discomfort; 10 mg/kg for mild symptoms or when giving more frequently.
Since 2011, all infant and children's liquid acetaminophen uses the same 160 mg/5 mL concentration. Chewable and junior tablets are for children age 2 and older who can chew safely.
Standard dose (15 mg/kg)Safe dose range
150mg

Recommended single dose of acetaminophen

Low dose (10 mg/kg)100mg
Liquid dose (160 mg/5 mL)4.75mL
Max dose per day748mg
Max liquid per day23.5mL
Tablet dose4.75 mL of 160 mg/5 mL liquid
Weight in kg9.98kg
150 mg
Too low / consult doctor<40Infant / child range40-480Older child / teen480-750Adult ceiling750+

Give 150 mg (4.75 mL) every 4-6 hours as needed.

  • At 22 lb (10.0 kg) and 15 mg/kg, the single dose is 150 mg, or 4.75 mL of the 160 mg/5 mL liquid.
  • You can give this dose every 4 to 6 hours as needed, but no more than 5 times in any 24-hour period. The daily ceiling is 748 mg.
  • Always use the syringe or dosing cup that comes with the product, not a kitchen spoon, to avoid measurement errors.
  • Check all other medicines your child is taking for hidden acetaminophen, common in cold, flu, and allergy products, to avoid double-dosing.

Next stepRecheck your child's weight every few weeks as they grow, because the correct dose increases with weight.

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