Dosage Infant Tylenol Calculator
Infant Tylenol Dosing Calculator works out Dose to give and Dose unit from Dosing chart, Child's weight and Weight unit. The default figures on this page give dose of 2.5 mL; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- Weight 16 lb (7.26 kg) falls in the "12 to 17 lb (5 to 7 kg)" band of the AAP / HealthyChildren.org acetaminophen dosing chart.
- That row gives 2.5 mL of Infants' acetaminophen oral suspension, 160 mg / 5 mL.
- Strength 160 mg in 5 mL (32 mg/mL), so each dose is 2.5 x 32 = 80 mg of acetaminophen.
- Repeat no sooner than every 4 hours and give no more than 5 doses in 24 hours: at most 400 mg in a day.
Its 6 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
4 sources
What the Infant Tylenol Dosing Calculator calculates
Reads the acetaminophen dose for a child's weight straight from the AAP dosing chart or the Infants'/Children's TYLENOL Drug Facts label, with the concentration, dosing interval and 24-hour ceiling, and also does prescriber-directed mg/kg and mg/m² arithmetic.
How to use this Infant Tylenol Dosing Calculator
Enter Dosing chart, Child's weight, Weight unit and Age (optional cross-check). Dose to give updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Dose to give, Dose unit and Dose.
The method follows Infants' TYLENOL (acetaminophen) oral suspension - FDA OTC Drug Facts label, DailyMed, Children's TYLENOL (acetaminophen) oral suspension - FDA OTC Drug Facts label, DailyMed, American Academy of Pediatrics / HealthyChildren.org - Acetaminophen pictographic dosing chart and AAP HealthyChildren.org - Acetaminophen dosing tables for fever and pain in children.
What you can compare
Change one input at a time to see how it affects Dose to give, Dose unit and Dose. The inputs you can vary are Dosing chart, Child's weight, Weight unit and Age (optional cross-check).
Understanding Dose to give, Dose unit and Dose
This is a lookup of a published dosing chart, not medical advice. It does not replace your child's doctor, pharmacist, or the Drug Facts label and dosing device on the pack you actually have. Check the concentration printed on your bottle before giving any dose, never combine two products containing acetaminophen, and call a doctor or poison centre immediately if you think too much has been given.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
What information do I need for the Infant Tylenol Dosing Calculator?
You need Dosing chart, Child's weight, Weight unit and Age (optional cross-check). The page opens with default figures that give dose of 2.5 mL, so you can see the scale before entering your own.
What does this Infant Tylenol Dosing Calculator show?
It shows Dose to give, Dose unit, Dose, Acetaminophen per dose, Strength assumed, Chart weight band, Chart age band and Repeat no sooner than, with the working and any warnings for your entries.
Can I check how the Infant Tylenol Dosing Calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.