Finding the correct Ibuprofen dosage chart by weight is essential for safely managing fever and pain in children and adults. As a licensed pharmacist, I created this Ibuprofen dosage chart by weight to help you calculate the exact dose of Advil or Motrin in both lbs and kg, ensuring maximum safety for your family.
Pediatric Ibuprofen Dosage Chart by Weight (Drops & Liquid)
Important: Do not give Ibuprofen to infants under 6 months unless specifically directed by your pediatrician.
| Weight (lbs) | Weight (kg) | Infant Drops (50mg/1.25mL) | Children’s Liquid (100mg/5mL) |
| 12 – 17 lbs | 5.5 – 7.7 kg | 1.25 mL | 2.5 mL |
| 18 – 23 lbs | 8.2 – 10.5 kg | 1.875 mL | 3.75 mL |
| 24 – 35 lbs | 10.9 – 15.9 kg | 2.5 mL | 5.0 mL |
| 36 – 47 lbs | 16.3 – 21.3 kg | 3.75 mL | 7.5 mL |
| 48 – 59 lbs | 21.8 – 26.8 kg | 5.0 mL | 10 mL |
| 60 – 71 lbs | 27.2 – 32.2 kg | – | 12.5 mL |
| 72 – 95 lbs | 32.7 – 43.1 kg | – | 15 mL |
Children’s Advil Pain Reliever and Fever Reducer, Liquid Ibuprofen for Children – 4 Fl Oz
Ibuprofen is a Non-Steroidal Anti-Inflammatory Drug (NSAID) used to reduce fever and treat pain. While Acetaminophen (Tylenol) is often the first line of defense, Ibuprofen is highly effective for inflammation and stubborn fevers that do not respond to other treatments.
Pharmacist’s Note on Fever: If a fever is persistent and does not drop with Tylenol, Ibuprofen is often recommended due to its stronger anti-inflammatory effect and longer duration (up to 8 hours).
Pharmacist Tip on Drops vs. Liquid: > “Infant Drops (Advil/Motrin) are much more concentrated than the Children’s Liquid version. Never swap the dispensers! Always use the dropper that comes with the specific bottle to avoid under-dosing or over-dosing your child.”
Adult & Teenager Dosage (Over 12 years)
Standard over-the-counter Ibuprofen tablets in the U.S. are 200 mg.
| Weight | Dose | Frequency |
| Over 95 lbs (43 kg) | 200 mg – 400 mg (1-2 tablets) | Every 4 to 6 hours |
Advil Liqui-Gels Pain Reliever and Fever Reducer, Pain Medicine for Adults with Ibuprofen 200mg for Headache, Backache, Menstrual Pain and Joint Pain Relief – 20 Liquid Filled Capsules
Do not exceed 1,200 mg (6 tablets) in 24 hours unless directed by a doctor.
Critical Safety Tips
- Always Take with Food: Ibuprofen can irritate the stomach lining. It is best to take it with a meal or a glass of milk.
- Stay Hydrated: Since Ibuprofen is filtered by the kidneys, ensure the patient drinks plenty of water.
- The “3-Hour” Rule: If you are alternating Tylenol and Ibuprofen for a high fever, wait at least 3 hours between different medications.
For more clinical details on the active ingredient, you can visit the official Ibuprofen information on Drugs.com.