Question 1

How do I calculate the right Tylenol dose for my baby?

Accepted Answer

The AAP guideline is 10–15 mg of acetaminophen per kilogram of body weight per dose. For the standard liquid concentration of 160 mg/5 mL (32 mg/mL), divide the mg dose by 32 to get mL. Our calculator does this for you — just enter your child's weight.

Question 2

How often can I give my baby Tylenol?

Accepted Answer

Acetaminophen can be given every 4–6 hours as needed. Do not give more than 5 doses in any 24-hour period. Space doses at least 4 hours apart.

Question 3

What is the concentration of infant Tylenol vs children's Tylenol?

Accepted Answer

Since 2011 in the US, both infant drops and children's liquid Tylenol use the same concentration: 160 mg per 5 mL (equivalent to 32 mg per mL). Prior to 2011, infant drops were more concentrated (80 mg/mL). Always check the label on your specific product.

Question 4

Can I give Tylenol to a baby under 2 months old?

Accepted Answer

No — do not give acetaminophen to infants younger than 2 months (8 weeks) without direct guidance from a doctor. Newborns and young infants have different metabolism, and fever in this age group is a medical emergency requiring immediate evaluation.

Question 5

How do I know how much to give if I only have the weight in pounds?

Accepted Answer

To convert pounds to kg, divide by 2.2. For example, a 15 lb baby weighs approximately 6.8 kg. At 10–15 mg/kg, that's 68–102 mg, or 2.1–3.2 mL of 160 mg/5 mL liquid. Our calculator handles this conversion automatically.

Question 6

What should I do if I accidentally give too much Tylenol?

Accepted Answer

Acetaminophen overdose is a medical emergency. Call Poison Control immediately at 1-800-222-1222 (US) or go to the nearest emergency room. Do not wait for symptoms — liver damage can occur without obvious early signs.

Child's Weight	Dose (mg)	Dose (mL)
6–11 lb (2.7–4.9 kg)	40 mg	1.25 mL
12–17 lb (5–7.9 kg)	80 mg	2.5 mL
18–23 lb (8–10.9 kg)	120 mg	3.75 mL
24–35 lb (11–15.9 kg)	160 mg	5 mL
36–47 lb (16–21.9 kg)	240 mg	7.5 mL
48–59 lb (22–26.9 kg)	320 mg	10 mL
60–71 lb (27–31.9 kg)	400 mg	12.5 mL
72–95 lb (32–43.9 kg)	480 mg	15 mL

	Acetaminophen (Tylenol)	Ibuprofen (Advil/Motrin)
Minimum age	2 months (with MD guidance)	6 months
Reduces fever	✅ Yes	✅ Yes
Reduces pain	✅ Yes	✅ Yes
Anti-inflammatory	❌ No	✅ Yes (good for swelling)
Frequency	Every 4–6 hrs (max 5/day)	Every 6–8 hrs (max 4/day)
Safe with dehydration	✅ Generally yes	⚠️ Avoid if dehydrated

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