Infant Tylenol Dosage Chart

Informational only — not medical advice. Always consult a licensed healthcare provider or pharmacist before taking any medication. In case of overdose call Poison Control: 1-800-222-1222 (US) or 911.

This infant Tylenol dosage chart shows the commonly published weight and age bands for the 160 mg per 5 mL acetaminophen liquid, so you can match your baby’s size to the right number of milliliters at a glance. Read it by weight first, use age only as a backup, and remember that for babies under about 24 lb — and always under 3 months — the chart’s real instruction is to confirm the dose with your pediatrician before giving anything. The figures are illustrative and label-dependent; your Drug Facts panel and your doctor are the final word.

How to read the infant Tylenol dosage chart

Using the chart is a three-step routine:

1. Find the weight band that includes your baby’s current weight.
2. Read across to the milliliters of 160 mg/5 mL liquid.
3. Confirm against your product’s Drug Facts label and, for babies under 2, your pediatrician.

Age columns exist for when you don’t have a recent weight, but weight is more accurate — two babies the same age can differ by several pounds.

Infant Tylenol dosage chart (160 mg/5 mL)

The volumes are small — 2.5 mL is half a teaspoon — which is why the infant product includes a syringe marked in milliliters. At this size, an overfilled spoon can be a real overdose.

Example weights from the chart

Using the illustrative bands above (always confirm with your label and pediatrician):

• 13 lb baby (about 5 months): 12–17 lb band → 2.5 mL (80 mg).
• 16 lb baby (about 7 months): 12–17 lb band → 2.5 mL (80 mg).
• 20 lb baby (about 1 year): 18–23 lb band → 3.75 mL (120 mg).
• 26 lb toddler (about 2 years): 24–35 lb band → 5 mL (160 mg).

Because bands cover a range, several weights share the same dose. Don’t jump to the next band to work faster — more acetaminophen only adds risk, not benefit.

Measuring accurately from the chart

• Use only the syringe supplied with your bottle; other syringes may be marked differently.
• Draw to the exact mL line at eye level, then dispense slowly into the cheek.
• Verify the concentration is 160 mg/5 mL; a different product changes every number on the chart.
• Write down the time and amount to avoid accidental double dosing overnight.

Why the chart starts with weight

A chart could be built on age alone, but weight is the more accurate basis because acetaminophen is dosed to body size. Two babies born the same week can differ by several pounds, and a chart that ignored that would over-treat the smaller one. Pediatric guidance describes the target as roughly 10–15 mg per kilogram per dose, and the weight bands above are simply that math turned into milliliters. When you use the weight row, you’re keeping your baby near the intended milligrams-per-kilogram rather than guessing from a birthday.

What a fever means in a baby

For infants, a rectal temperature of 100.4°F (38°C) or higher is generally considered a fever, and rectal measurement is the most accurate for the youngest babies. Forehead and ear thermometers are convenient but less precise in small infants — if a reading seems inconsistent, confirm rectally.

Fever itself is usually a normal immune response, not the illness. A baby who is feeding, making wet diapers, and settling between fussy spells is generally handling a fever well. The chart tells you a dose amount, but a comfortable, drinking baby may not need medicine at all — treat the child, not the number.

Comfort measures between doses

Dosing from the chart works best alongside supportive care:

• Offer feeds often — breast milk or formula keeps a baby hydrated, which matters more than the fever number.
• Use one light layer of clothing in a comfortable room; avoid bundling, cold baths, and rubbing alcohol.
• Hold and rest. Extra comfort and calm help a baby settle between doses.

Common mistakes when using a dosing chart

The chart is only as safe as the way you use it. Avoid these:

• Reading the wrong row — always match your baby’s actual weight, not a rounded-up guess.
• Using a spoon or a different syringe instead of the one in the box.
• Assuming an old “infant drops” bottle is the same strength — pre-2011 concentrated drops were much stronger than today’s 160 mg/5 mL.
• Ignoring the concentration line on the label; a different product changes every mL figure.
• Combining acetaminophen products, which can exceed the daily limit without any single dose looking large.

Storing the product safely

Keep the bottle in its original packaging with the Drug Facts label, store it at room temperature away from heat and moisture, and keep it up, away, and out of a child’s reach and sight. Child-resistant caps slow a curious toddler but are not childproof, and accidental ingestion is a leading cause of pediatric acetaminophen overdose. Note the expiration date and discard expired liquid.

How long does a dose from the chart take to work?

Acetaminophen usually begins easing fever and discomfort within about 30 to 60 minutes, with fuller effect over the next hour or so, and a dose typically lasts 4 to 6 hours. If your baby seems no better after an hour, don’t dose again before the interval is up — recheck that you read the correct weight row and measured accurately, offer a feed and comfort, and call your pediatrician if the fever is high or the baby seems unwell. A weak response is a reason to reassess, not to give more.

How the infant chart relates to the children’s chart

Because U.S. infants’ and children’s liquids are both 160 mg/5 mL, the numbers on this infant chart line up seamlessly with the children’s dosage and Tylenol dosage by weight charts — they’re the same underlying bands. This infant-focused chart simply emphasizes the youngest weights and the syringe, while the children’s chart extends to heavier kids and adds 80 mg chewable tablets. If your child outgrows this chart’s top row, move up to the children’s chart without changing products; only the volume and, eventually, the option of chewables change.

Acetaminophen vs. ibuprofen for babies

Parents sometimes ask which fever reducer to keep on hand. Acetaminophen (Tylenol) can be used from the youngest ages under a doctor’s guidance, while ibuprofen (Advil, Motrin) is generally only for babies 6 months and older and is taken with food. Acetaminophen is gentler on the stomach and does not reduce inflammation; ibuprofen is an anti-inflammatory. Neither is meaningfully “stronger” as a fever reducer. For a young baby, don’t alternate the two on your own — confirm any plan with your pediatrician first.

Keeping the chart handy

Many parents save a dosing chart on their phone or tape one inside a cabinet, which is fine — but a saved chart is only correct for the product and concentration it was made for. If you switch brands or your product’s Drug Facts label shows a different concentration, the saved numbers may no longer apply. Treat any chart, including this one, as a convenient reference to be checked against the label on the bottle in your hand, and re-verify your baby’s current weight, since a chart saved months ago may point to an outdated row.

How often can I use the chart’s dose?

Doses can be repeated every 4 hours as needed, with no more than 5 doses in any 24-hour window, unless your pediatrician says otherwise. The chart tells you the amount per dose — it is not permission to dose more often. If fever or discomfort persists past the label limits, call your doctor instead of adding doses. For the full explanation, see infant Tylenol dosage and baby Tylenol dosage.

When to call the pediatrician

• Your baby is under 3 months with any fever, or under 2 and you’re unsure of the dose.
• Fever lasts more than a couple of days, keeps climbing, or the baby seems very ill or hard to wake.
• Your baby won’t take fluids, has fewer wet diapers, or shows dehydration signs.

The chart handles “how much”; your pediatrician handles “what’s going on.” For older children, see Tylenol dosage by weight and children’s Tylenol dosage. For product basics, see Infant Tylenol.

Bottom line

This infant Tylenol dosage chart matches your baby’s weight to a dose of the 160 mg/5 mL liquid, measured only with the syringe in the box, repeated no more than every 4 hours and 5 times a day. For babies under about 24 lb — and always under 3 months — the chart’s true instruction is to confirm with your pediatrician first. The numbers are illustrative; your Drug Facts label and doctor give the final amount. This is general information, not medical advice.