Ibuprofen Dosage Calculator
Clinical mg/kg Logic for Motrin & Advil
Calculation Methodology
Give mL every 6-8 hours
For oral administration, round to the nearest 0.1 mL. Use the provided oral syringe for precision.
The mg/kg Formula Explained
For Ibuprofen (marketed as Motrin or Advil), the standard pediatric dose is 10mg per kg of body weight. This dose is typically given for fevers over 102.5°F (39.2°C) or moderate pain.
When to use 5mg/kg?
For lower fevers (under 102.5°F), pediatricians sometimes recommend a lower dose of 5mg/kg. You can adjust the "Target Dose" in the calculator above to see this value. However, most parents use the 10mg/kg standard to ensure efficacy.
Calculated Safety Limit
"The daily maximum for Ibuprofen is 40mg/kg per day. At a standard dose of 10mg/kg, this means you can give at most 4 doses in 24 hours."
Safety FAQs
How old must my baby be?
6 Months. Unlike Tylenol, Ibuprofen should NOT be given to infants under 6 months unless specifically directed by a doctor, due to immature kidney function.
Take with food?
Yes. Ibuprofen can irritate the stomach lining. It is best to give it with milk or a meal to prevent stomach aches.
Ibuprofen Forms
- Children's Motrin/Advil 100mg/5mL
- Infant Drops 50mg/1.25mL
- Junior Tablets 100mg tab
Did you know?
Antibiotic suspensions are often "reconstituted" by the pharmacist with water. Once mixed, most only last for 10-14 days and many require refrigeration. Check your bottle's storage instructions!
Related Tools
Standard Ibuprofen Reference
Typical single doses for 100mg/5mL concentration.
| Weight (kg) | Single Dose (5mg/kg) | Single Dose (10mg/kg) |
|---|---|---|
| 10kg Child (22 lbs) | ||
| 10 kg | 50mg (2.5 mL) | 100mg (5.0 mL) |
| 15kg Child (33 lbs) | ||
| 15 kg | 75mg (3.8 mL) | 150mg (7.5 mL) |
| 20kg Child (44 lbs) | ||
| 20 kg | 100mg (5.0 mL) | 200mg (10.0 mL) |
Clinical Review
Dr. Igor I. Bussel is a board-certified ophthalmologist and fellowship-trained surgeon affiliated with the University of California, Irvine (UCI), the Gavin Herbert Eye Institute, and the UCI School of Medicine.
Sources & Guidelines
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