Infant Ibuprofen Dosage Calculator (Motrin)

An infant ibuprofen calculator for US Infants’ Motrin concentrated drops. Match the 50 mg/1.25 mL bottle before selecting a printed weight or age range.

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Infant Motrin dosage by weight or age

The infant chart lists 6–11 months and 12–23 months. For babies under 6 months, ask a healthcare provider. Do not reuse a liquid amount from Children’s Motrin: its concentration differs.

How do infant and children’s Motrin differ?

Infants’ drops contain 50 mg per 1.25 mL; Children’s suspension contains 100 mg per 5 mL. Select the actual bottle and use its supplied measuring device. The tool does not convert doses between concentrations.

Read the manufacturer’s full guidance

Supported bottles

US liquid products supported by this calculator
BottleIngredientStrengthUses
Infants’ MOTRINIbuprofen50 mg / 1.25 mLWeight or age

US liquid products shown here only. Do not apply these amounts to another strength, formulation or country’s product. Use the measuring device supplied with your bottle and read the full label; this page does not reproduce every warning.

Infants’ MOTRIN — 50 mg / 1.25 mL

Use weight if known; otherwise use age. The weight and age columns are alternatives from the label, not a formula. If the child is outside the listed age range or the weight falls outside a printed band, ask a clinician. Do not interpolate.

Infants’ MOTRIN — 50 mg / 1.25 mL
Weight (lb)Age on labelLabel amountLabel reference
Under 12Under 6 monthsAsk your child’s doctorUnder 12 lb
12–176–11 months1.25 mL12–17 lb
18–2312–23 months1.875 mL18–23 lb

Label interval: every 6–8 hours if needed. No more than 4 doses in 24 hours.

Full MOTRIN label guidance

Keep another caregiver in the loop

Share this calculator so they can match their own bottle. The link contains no child details or dosage results.

How KinToolkit prepares this information

KinToolkit organizes the selected US liquid medicine labels into bottle-matching tools and reference tables. The calculator and these tables use the same range lookup, not a continuous weight formula. Manufacturer labels are the primary sources; this summary does not establish an independently validated or clinically reviewed dosing protocol.

Label sources checked: . This is a source-check date, not a clinical-review date.

Before using label directions

Verify the active ingredient, concentration and warnings on your own package. KinToolkit is an independent educational tool, not a medical professional or a substitute for your child’s clinician. The brands mentioned above are not affiliated with KinToolkit.

Sources and accessible text

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