Calculate the correct infant and children's Tylenol (acetaminophen) dose by your child's weight. Get the precise mL amount for 160 mg/5 mL liquid, the mg dose range, maximum single dose, and maximum daily dose — all based on official AAP pediatric guidelines.
✓Formula verified: AAP guidelines 10–15 mg/kg/dose · FDA standardized 160 mg/5 mL · April 2026
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lbs
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Please enter weight (4–120 lbs or 2–54 kg).
Dose to Give (mL)
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mL of Infant/Children's Tylenol (160 mg/5 mL)
Dose (mL)
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160 mg/5 mL liquid
Dose (mg)
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mg range
Max Daily (mg)
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per 24 hours
Max Daily (mL)
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5 doses max
⚠️ Medical Disclaimer: This calculator is for educational reference only and is based on AAP guidelines. Always consult your pediatrician or healthcare provider before giving any medication to your child. Do not give acetaminophen to infants under 2 months without a doctor's guidance. If your child is under 12 weeks old with a fever, seek emergency medical care immediately. In case of suspected overdose, call Poison Control at 1-800-222-1222 (US) immediately.
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Sources & Methodology
✓All dosing information is based on official guidelines from the American Academy of Pediatrics (AAP) and FDA-standardized acetaminophen concentrations.
Official American Academy of Pediatrics dosing guidance. Confirms standard liquid concentration of 160 mg/5 mL since FDA 2011 standardization. Dose: 10–15 mg/kg per dose, every 4–6 hours, maximum 5 doses in 24 hours. Updated January 2026.
Medscape clinical reference confirms 10–15 mg/kg/dose PO every 4–6 hours, maximum 2,600 mg (75 mg/kg) per 24 hours. Reviewed by board-certified pediatric pharmacists. Used to verify maximum daily dose calculation in this calculator.
Hospital-grade reference confirming the 2011 FDA standardization move to one concentration (160 mg/5 mL) for all liquid pediatric acetaminophen. Confirms suppository equivalence and extended-release avoidance in children.
Formula used: Dose (mg) = Weight (kg) × 12.5 mg/kg (midpoint of 10–15 mg/kg range). mL = mg ÷ 32 (since 160 mg ÷ 5 mL = 32 mg/mL). Maximum daily: 75 mg/kg/day or 2,600 mg/day, whichever is less.
Infant Tylenol Dosage by Weight: Complete Parent Guide
Getting the right dose of infant Tylenol (acetaminophen) for your baby is one of the most important medication safety decisions parents make. Unlike adult medications where a standard dose applies to everyone, pediatric acetaminophen dosing is weight-based — the heavier the child, the more medication they can safely receive. Using the wrong dose can either be ineffective (if too low) or dangerous (if too high). This guide explains everything parents need to know about safe infant and children's Tylenol dosing based on current AAP guidelines.
Dose (mg) = Weight (kg) × 12.5 mg/kgmL to give = Dose (mg) ÷ 32
Based on the midpoint of the AAP-recommended range of 10–15 mg/kg per dose.
The divisor 32 comes from the standard concentration: 160 mg ÷ 5 mL = 32 mg per mL. Example: A 22 lb (10 kg) baby: 10 × 12.5 = 125 mg ÷ 32 = 3.9 mL
✓Verified against AAP HealthyChildren.org & Medscape pediatric dosing — April 2026
What Is the Standard Infant Tylenol Concentration?
Since 2011, the FDA recommended that all liquid pediatric acetaminophen products be made in one standard concentration: 160 mg per 5 mL. This applies to both Infants' Tylenol and Children's Tylenol liquid suspension. Before 2011, there were two concentrations: 80 mg/0.8 mL (concentrated infant drops) and 160 mg/5 mL (children's liquid). The old concentrated infant drops are no longer sold, eliminating a common source of dosing errors. Always check the bottle label to confirm the concentration before dosing, especially if you have an old bottle or are using a product from another country where concentrations may differ.
Infant Tylenol Dosage Chart by Weight (160 mg/5 mL)
The table below shows the recommended dose range for acetaminophen liquid suspension (160 mg/5 mL). Dose at the 10–15 mg/kg range. For most situations, use the midpoint (12.5 mg/kg). Use the higher end only for more significant fevers or pain, and only if your child has no liver concerns. Always use the dosing syringe included with the product.
Weight (lbs)
Weight (kg)
Low Dose (10 mg/kg)
Mid Dose (12.5 mg/kg)
High Dose (15 mg/kg)
mL Range (160mg/5mL)
Max Daily (mg)
6–8 lbs
2.7–3.6 kg
27–36 mg
34–45 mg
41–54 mg
0.8–1.7 mL
200–270 mg
8–11 lbs
3.6–5.0 kg
36–50 mg
45–63 mg
54–75 mg
1.1–2.3 mL
270–375 mg
11–16 lbs
5.0–7.3 kg
50–73 mg
63–91 mg
75–110 mg
1.6–3.4 mL
375–545 mg
16–22 lbs
7.3–10 kg
73–100 mg
91–125 mg
110–150 mg
2.3–4.7 mL
545–750 mg
22–27 lbs
10–12.3 kg
100–123 mg
125–154 mg
150–185 mg
3.1–5.8 mL
750–920 mg
27–33 lbs
12.3–15 kg
123–150 mg
154–188 mg
185–225 mg
3.8–7.0 mL
920–1125 mg
33–44 lbs
15–20 kg
150–200 mg
188–250 mg
225–300 mg
4.7–9.4 mL
1125–1500 mg
44–55 lbs
20–25 kg
200–250 mg
250–313 mg
300–375 mg
6.3–11.7 mL
1500–1875 mg
55–66 lbs
25–30 kg
250–300 mg
313–375 mg
375–450 mg
7.8–14.1 mL
1875–2250 mg
66–77 lbs
30–35 kg
300–350 mg
375–438 mg
450–500 mg
9.4–15.6 mL
2250–2600 mg
Acetaminophen Dosing Safety Rules Every Parent Must Know
Acetaminophen is extremely safe when used correctly. The risks arise almost entirely from improper dosing. Follow these evidence-based rules every time:
Every 4–6 hours only: Never give doses more frequently than every 4 hours, and allow 6 hours when possible.
Maximum 5 doses per day: Even if spaced 4 hours apart, do not exceed 5 doses in any 24-hour period.
Check all medications for acetaminophen: Many children's cold, flu, and sleep medications contain acetaminophen. Double-dosing is a leading cause of pediatric acetaminophen toxicity.
Use only the included dosing device: The syringe or cup included with the product is calibrated for accuracy. Household spoons vary significantly in volume.
Do not give to infants under 2 months without a doctor's guidance.
Not for extended use: Acetaminophen is for temporary symptom relief. If your child needs fever or pain relief for more than 3 consecutive days, consult a pediatrician.
⚠️ Poison Control: Acetaminophen overdose is a medical emergency. If you believe your child may have received too much acetaminophen — even if they seem fine — call Poison Control immediately at 1-800-222-1222 (US). Do not wait for symptoms. Liver damage from acetaminophen overdose can occur 72–96 hours after ingestion and may be preventable if treated early.
Tylenol vs Store Brand Acetaminophen: Is There a Difference?
Tylenol is the most well-known brand name for acetaminophen, but dozens of store-brand alternatives (CVS Health, Walgreens Well at Walgreens, Target Up&Up, Walmart Equate) contain the same 160 mg/5 mL acetaminophen liquid at significantly lower cost. The FDA requires all generic versions to meet the same standards for potency, purity, and concentration. The dosing calculation in this calculator applies equally to all brands. The key differences are packaging, taste additives (flavorings), and price — not the medication itself.
💡 Parent Tip — Pre-Measure Before Bedtime: For nighttime doses, pre-measure the calculated amount into the dosing syringe before your child's bedtime and leave it on the nightstand. This prevents accidental dosing errors when you're half-asleep at 3 AM. Write the dose amount and maximum daily total on a sticky note so all caregivers give consistent amounts.
Frequently Asked Questions
The standard dose is 10 to 15 mg per kilogram of body weight per dose. For the standard 160 mg/5 mL liquid, divide the mg dose by 32 to get mL. For a 10-pound (4.5 kg) baby, the dose is 45 to 68 mg, approximately 1.4 to 2.1 mL. Use this calculator to get the exact amount for your child's specific weight. Always use the dosing syringe that came with the product.
Infant Tylenol can be given every 4 to 6 hours as needed. Never give more than 5 doses in any 24-hour period. Always wait at least 4 hours between doses. Do not exceed the maximum daily dose of 75 mg/kg per day or 2,600 mg per day (whichever is less).
Since the FDA standardization in 2011, all liquid pediatric acetaminophen — including both Infants' Tylenol and Children's Tylenol — is 160 mg per 5 mL. The old concentrated infant drops (80 mg/0.8 mL) are no longer sold. Always check the bottle label to confirm the concentration before dosing.
Do not give acetaminophen to infants under 2 months without a doctor's guidance. Fever in the first 12 weeks of life may indicate a serious infection. If your baby under 3 months has a rectal temperature above 100.4 degrees F (38 degrees C), call your pediatrician or go to the emergency room immediately. Do not use fever-reducing medication without medical guidance for very young infants.
The maximum daily dose of acetaminophen is 75 mg/kg/day or 2,600 mg/day, whichever is lower. For a 22-pound (10 kg) baby, the max daily dose is 750 mg total. This is equivalent to approximately 23.4 mL of 160 mg/5 mL suspension split across up to 5 doses. Never exceed these limits. Check all medications for hidden acetaminophen.
Do not give both at the same time without medical supervision. Some pediatricians recommend alternating acetaminophen and ibuprofen every 3 to 4 hours for persistent high fevers, but only under specific medical guidance. Important: ibuprofen is not approved for infants under 6 months of age. Always follow your doctor's specific instructions for your child.
Acetaminophen overdose is a medical emergency. Call Poison Control immediately at 1-800-222-1222 (US) or go to the emergency room. Do not wait for symptoms. Early symptoms include nausea, vomiting, and abdominal pain, but liver damage can begin 72 to 96 hours after overdose even if the child initially seems fine. Time is critical.
Yes. Since the FDA standardization in 2011, both Infants' Tylenol and Children's Tylenol liquid are the same concentration: 160 mg per 5 mL. The main difference is the dosing device: Infants' Tylenol comes with an oral syringe (for precision with small doses), while Children's Tylenol comes with a dosing cup. The dose calculation is identical.
Always use the oral dosing syringe that came with the Infants' Tylenol product. Dosing syringes are significantly more accurate than household spoons, which can vary by 20 to 40% in volume. Measure with the child sitting upright. Dispense the medication slowly into the side of the mouth (not the back of the throat) to prevent choking.
Acetaminophen typically begins reducing fever and relieving pain within 30 to 60 minutes of administration. Peak effect occurs around 1 to 2 hours. The total duration of action is approximately 4 to 6 hours. If the fever or pain returns before 4 hours have elapsed, you must wait before giving another dose.
Acetaminophen can be used to treat fever or discomfort after vaccines in infants 2 months and older. The same weight-based dosing applies. Post-vaccine use to treat symptoms is generally supported by the AAP. Older guidance suggested avoiding pre-emptive acetaminophen before vaccines as it may slightly reduce immune response, but this remains a discussion point with your pediatrician.
Yes. Store-brand acetaminophen (CVS, Walgreens, Target, Walmart) at the same 160 mg/5 mL concentration is clinically identical to Tylenol brand. The FDA requires bioequivalence for all generic products. The dosing calculation from this calculator applies equally to all brands. The differences are only in packaging, flavorings, and price.