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Dosage Tylenol Calculator

Tylenol Dosage Calculator works out Dose to give and Dose unit from Dosing chart, Product on hand and Child's weight. The default figures on this page give dose of 7.5 mL; change any entry and the result, the working and the sources update together.

Dose
7.5 mL
Paediatric Dose Calculator (Infant and Children's Acetaminophen)
Dose to give
7.500
Dose unit
mL
Acetaminophen per dose
240.0 mg
Strength assumed
160 mg in 5 mL (32 mg/mL)
Chart weight band
36 to 47 lb (16 to 21 kg)
Chart age band
4 to 5 years
Repeat no sooner than
4 hours
Maximum doses in 24 hours
5
Maximum acetaminophen in 24 hours
1,200.0 mg
Works out to
13.23 mg/kg per dose
Weight used
18.144 kg
Weight used
40.00 lb
Chart used
AAP / HealthyChildren.org acetaminophen dosing chart
Worked out from Infants' TYLENOL (acetaminophen) oral suspension - FDA OTC Drug Facts label, DailyMed and 3 other sources.
Check the bottle: this dose assumes 160 mg in 5 mL (32 mg/mL). A different concentration means a different volume.
Use only the dosing syringe or cup that came with the product.
Never give another product containing acetaminophen at the same time, including combination cough and cold medicines.
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.

Your figures

Updates as you type
The AAP chart covers infants from 6 lb; the OTC label declines to dose under 24 lb and this calculator declines with it.
Every liquid product sold in the US as infants' or children's acetaminophen is 160 mg in 5 mL. Check your own bottle.
Dose by weight whenever the weight is known; the age bands are only a fallback.
Used only to flag a mismatch with the weight band and to warn below two years.

How this is worked out

4 steps
  1. Weight 40 lb (18.14 kg) falls in the "36 to 47 lb (16 to 21 kg)" band of the AAP / HealthyChildren.org acetaminophen dosing chart.
  2. That row gives 7.5 mL of Children's acetaminophen oral suspension, 160 mg / 5 mL.
  3. Strength 160 mg in 5 mL (32 mg/mL), so each dose is 7.5 x 32 = 240 mg of acetaminophen.
  4. Repeat no sooner than every 4 hours and give no more than 5 doses in 24 hours: at most 1200 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
Infants' TYLENOL (acetaminophen) oral suspension - FDA OTC Drug Facts label, DailyMed
Acetaminophen 160 mg in 5 mL. "under 24 lb / under 2 years: ask a doctor"; 24-35 lb (2-3 years) 5 mL; repeat every 4 hours; do not give more than 5 times in 24 hours.
Children's TYLENOL (acetaminophen) oral suspension - FDA OTC Drug Facts label, DailyMed
Acetaminophen 160 mg in 5 mL. 24-35 lb 5 mL; 36-47 lb 7.5 mL; 48-59 lb 10 mL; 60-71 lb 12.5 mL; 72-95 lb 15 mL; every 4 hours, maximum 5 doses in 24 hours.
American Academy of Pediatrics / HealthyChildren.org - Acetaminophen pictographic dosing chart
Weight bands 6-11, 12-17, 18-23, 24-35, 36-47, 48-59, 60-71, 72-95 and 96+ pounds across infants' and children's 160 mg/5 mL suspension, 160 mg chewables, 160 mg dissolvable packets and adult tablets. "Do not give more than 5 doses in 24 hours." "Acetaminophen should not be given to children under two years of age without the guidance of a doctor."
AAP HealthyChildren.org - Acetaminophen dosing tables for fever and pain in children

What the Tylenol Dosage 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 Tylenol Dosage Calculator

Enter Dosing chart, Product on hand, Child's weight and Weight unit. 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, Product on hand, 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.

Embed this calculator on your website

Copy this code into any page. The calculator appears with the figures currently entered, sizes itself to fit, and a small credit line links back here. Free, no account, no ads inside it, no tracking of your readers. Set your own figures and fixed fields; Personal removes the credit line, sets your colour and shows you which sites use it.

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Frequently asked questions

What information do I need for the Tylenol Dosage Calculator?

You need Dosing chart, Product on hand, Child's weight, Weight unit and Age (optional cross-check). The page opens with default figures that give dose of 7.5 mL, so you can see the scale before entering your own.

What does this Tylenol Dosage 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 Tylenol Dosage 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.

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