Acetaminophen Pediatric Dose Calculator
Look up the weight-band dose on one current U.S. children’s acetaminophen 160 mg per 5 mL label, while screening for common reasons to stop and read the actual package or contact a healthcare professional.
Verify child, bottle, and dose log
The exact label chart used by this calculator
| Weight | Age | 160 mg/5 mL dose | Acetaminophen |
|---|---|---|---|
| Under 24 lb | Under 2 years | Ask a doctor | No calculator dose |
| 24–35 lb | 2–3 years | 5 mL | 160 mg |
| 36–47 lb | 4–5 years | 7.5 mL | 240 mg |
| 48–59 lb | 6–8 years | 10 mL | 320 mg |
| 60–71 lb | 9–10 years | 12.5 mL | 400 mg |
| 72–95 lb | 11 years | 15 mL | 480 mg |
This is a transcription of one current DailyMed children’s acetaminophen suspension label. Another product, formulation, age group, concentration, prescription, or clinician direction can differ. The package in hand controls; this table does not replace it.
How milliliters become milligrams
Concentration = 160 mg ÷ 5 mL = 32 mg/mL
Amount in mg = label-chart volume × 32 mg/mL
Default example = 7.5 mL × 32 mg/mL = 240 mg
The calculator does not invent a weight-based mg/kg dose. It chooses the exact weight band on the cited 160 mg/5 mL OTC label and converts that label volume back to milligrams for a cross-check. The result must match the package directions before use.
Worked 44 lb, age 5 example
A weight of 44 lb falls in the 36–47 lb label row, which lists 7.5 mL. Age 5 falls in the same row’s 4–5 year range, so the inputs agree. At 160 mg in 5 mL, each milliliter contains 32 mg. Multiplying by 7.5 mL gives 240 mg.
The label says to repeat every four hours while symptoms last and not more than five times in 24 hours. The example log shows one prior dose and five hours since it, so it has not crossed the label interval or occasion limits. That does not mean a new dose is needed or medically appropriate; symptoms, allergies, other products, disease, and clinician instructions still matter.
Five occasions at this band would total 37.5 mL and 1,200 mg. Those totals are limit cross-checks, not a schedule. Count every acetaminophen-containing prescription and nonprescription product in the same rolling 24-hour period.
The calculator’s stop gates
Child outside the chart
Under 24 lb or under age 2 produces “ask a doctor,” exactly as the label directs. Weight above 95 lb or age above 11 is outside this children’s chart; use the correct product label and professional advice.
Bottle mismatch
Anything other than exactly 160 mg per 5 mL blocks the volume. Old or different concentrations, dissolving tablets, chewables, adult products, extended-release products, and combination medicines are not interchangeable.
Safety mismatch
Duplicate acetaminophen, liver disease, conflicting age and weight rows, fewer than four hours, or five prior occasions blocks a “ready” status. A stop state is not a substitute for medical or poison-control advice.
Four label-first checks before any administration
Read
Read active ingredient, strength, route, age/weight directions, warnings, expiration, and storage on the exact bottle every time.
Reconcile
List every cold, flu, pain, sleep, and prescription product. Do not combine products containing acetaminophen.
Measure
Shake if the label says so and use only the supplied oral syringe or dosing cup. Do not use a kitchen spoon or another product’s device.
Log
Write the product, concentration, volume, amount, time, and caregiver. Use one shared rolling 24-hour log.
Treat the child, not only a temperature
Acetaminophen is labeled to temporarily reduce fever and relieve minor aches and pains. A temperature alone does not establish the cause, severity, or need for medicine. Age, appearance, breathing, hydration, responsiveness, pain, rash, stiff neck, seizure, immune status, and other symptoms can matter.
The cited label says to stop use and ask a doctor if pain worsens or lasts more than five days, fever worsens or lasts more than three days, new symptoms occur, or redness or swelling is present. Younger infants and children with significant conditions may need earlier assessment. Follow current pediatric guidance from the child’s clinician.
Do not delay evaluation of a very ill child because a medicine lowered the temperature. This calculator cannot assess dehydration, respiratory distress, serious infection, ingestion, allergic reaction, or another emergency.
Overdose and ingredient-duplication response
Acetaminophen overdose can cause severe liver injury, and early symptoms may be absent. If too much may have been given, the concentration was confused, two containing products overlapped, or the dose history is uncertain, do not wait for symptoms. Follow the label’s instruction to get medical help or contact U.S. Poison Control immediately.
Keep the packages and dosing devices available for the professional. Record product names, active ingredients, strengths, estimated amounts, times, child’s current weight, and symptoms, but do not delay the call to make a perfect record. Do not induce vomiting or improvise a remedy unless a qualified professional instructs you.
A web calculator cannot evaluate toxicity or decide that an exposure is safe. The 24-hour totals displayed here assume the same single-ingredient product and do not account for a previous concentration, combination product, prescription dose, or calculation error.
Situations requiring individual professional advice
Ask a doctor before use when the child has liver disease, as the label states. Also seek individualized advice for prior acetaminophen reaction, severe malnutrition, significant kidney or other disease, complex medication regimens, ongoing vomiting, inability to take liquids, recent overdose, or clinician-specific dosing instructions. A pharmacist can help identify duplicate active ingredients and the correct device.
The DailyMed label instructs asking a doctor or pharmacist when the child takes warfarin. It also contains allergy and severe-skin-reaction warnings. Read the full Drug Facts rather than relying on a calculator summary.
If a healthcare professional gives directions that differ from the package, clarify the exact product, concentration, amount, unit, interval, maximum, and duration with that professional. Do not convert an old dropper marking to a new bottle by memory.
A safe caregiver handoff record
Use a single log shared by every caregiver. Include the child’s measured weight and date, exact product name, concentration, dose in mL and mg, administration time, reason, temperature method when relevant, and initials. Cross out—not erase—an entry that was prepared but not given.
Store medicines in child-resistant packaging and out of sight and reach. Keep the supplied dosing device with its bottle. Do not call a liquid “one spoonful,” because household spoons vary and handoffs can multiply errors.
It does not determine medical advice, medicine coverage, medical-expense deductions, or pediatric eligibility.
Final label check
- Confirm single active ingredient.
- Confirm exactly 160 mg per 5 mL.
- Use current measured weight if possible.
- Resolve age/weight disagreement.
- Read every Drug Facts warning.
- Check every other medicine.
- Use the enclosed device only.
- Record every administration time.
- Count a rolling 24-hour total.
- Never exceed the label direction.
- Ask a professional when uncertain.
- Act immediately after possible overdose.
Frequently asked questions
What dose does the cited label give a 44 lb, 5-year-old child?
The 36–47 lb, age 4–5 row lists 7.5 mL of the 160 mg/5 mL suspension, equal to 240 mg. Verify the actual package and appropriateness first.
Can I enter a different liquid concentration?
You can check the bottle fields, but the calculator blocks a dose unless they equal 160 mg per 5 mL. Follow the different product’s own label or a professional.
Should I use weight or age?
The cited label says to use weight if possible, otherwise age. This safety gate requests both and stops when their label rows conflict.
Can I alternate acetaminophen with another fever medicine?
This calculator does not create alternating schedules. They can cause timing and duplication errors. Ask the child’s clinician or pharmacist for explicit written instructions.
What if I may have given too much?
Do not wait for symptoms. Follow the product’s overdose warning: get medical help or contact U.S. Poison Control immediately and keep the package available.
References
- National Library of Medicine DailyMed, current Children’s Tylenol acetaminophen 160 mg/5 mL label
- U.S. Food and Drug Administration, acetaminophen safety
- U.S. Food and Drug Administration, pediatric liquid acetaminophen concentration questions
- U.S. Food and Drug Administration, OTC pediatric liquid acetaminophen guidance
- Poison Control, official U.S. online and contact resource
Last Updated on 2026/08/05