# Infant Ibuprofen Dosage Calculator (Motrin)

Published by: KinToolkit
Canonical URL: https://kintoolkit.com/infant-ibuprofen-dosage-calculator
Language: en-US
Label sources checked: 2026-09-24 (source verification, not clinical review)

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.

## 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.


## Supported bottles

| Bottle | Ingredient | Strength | Uses |
| --- | --- | --- | --- |
| Infants’ MOTRIN | Ibuprofen | 50 mg / 1.25 mL | Weight 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.

| Weight (lb) | Age on label | Label amount | Label reference |
| --- | --- | --- | --- |
| Under 12 | Under 6 months | Ask your child’s doctor | [Under 12 lb](https://kintoolkit.com/infant-ibuprofen-dosage-calculator/50-mg-per-1-25-ml/under-12-lb) |
| 12–17 | 6–11 months | 1.25 mL | [12–17 lb](https://kintoolkit.com/infant-ibuprofen-dosage-calculator/50-mg-per-1-25-ml/12-17-lb) |
| 18–23 | 12–23 months | 1.875 mL | [18–23 lb](https://kintoolkit.com/infant-ibuprofen-dosage-calculator/50-mg-per-1-25-ml/18-23-lb) |

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

[Full MOTRIN label guidance](https://www.motrin.com/children-infants/dosing-charts)

## Methodology and attribution

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.

## 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

- [Motrin: children and infants dosing charts](https://www.motrin.com/children-infants/dosing-charts)
- [American Academy of Pediatrics: ibuprofen for fever and pain](https://www.healthychildren.org/English/safety-prevention/at-home/medication-safety/Pages/Ibuprofen-for-Fever-and-Pain.aspx)

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