Dose Inputs
This calculator uses common pediatric guidance for ibuprofen dosing. Do not use for children under 6 months unless directed by a clinician. Avoid ibuprofen when dehydration, kidney disease, stomach bleeding, or NSAID allergy is present.
How to Use This Calculator
- Enter your child’s weight and select kg or lb.
- Enter age and choose months or years.
- Select a dose strength (mg/kg) or enter a custom value.
- Pick your liquid concentration or enter mg/mL from the label.
- Choose interval and rounding, then calculate.
- Review warnings and avoid exceeding daily limits.
Formula Used
- Weight conversion: kg = lb ÷ 2.2046226218
- Dose per dose (mg): dose = weight(kg) × dose(mg/kg)
- Apply cap: dose = min(dose, max single-dose mg)
- Volume (mL): volume = dose(mg) ÷ concentration(mg/mL)
- Rounded volume: round(volume ÷ step) × step
- Rounded dose: rounded dose = rounded volume × concentration
- Daily limit (mg): max daily = weight(kg) × limit(mg/kg/day)
Example Data Table
Example only. Uses 10 mg/kg, 100 mg/5 mL, every 6 hours.
| Weight (kg) | Dose (mg/kg) | Dose (mg) | Volume (mL) | Interval |
|---|---|---|---|---|
| 10 | 10 | 100 | 5.00 | 6 h |
| 15 | 10 | 150 | 7.50 | 6 h |
| 20 | 10 | 200 | 10.00 | 6 h |
| 25 | 10 | 250 | 12.50 | 6 h |
FAQs
1) What dose range is commonly used for children?
Many references use 5–10 mg per kg per dose every 6–8 hours, with limits on total daily dosing. Always follow your clinician and the product label for your child’s situation.
2) Can I use this for babies under 6 months?
Most consumer guidance says not to use ibuprofen under 6 months unless your child’s doctor tells you to. This calculator will flag ages below 6 months as a safety warning.
3) Why does the calculator cap the single dose?
A single-dose cap helps avoid unusually large amounts. You can adjust the cap, but common maximums cited for a single pediatric dose are around 400 mg. If you need higher dosing, a clinician should guide it.
4) What if the liquid label shows a different concentration?
Select “Custom (mg/mL)” and enter the label’s mg per mL. Double-check the label carefully, because different products can have different strengths, especially drops versus suspensions.
5) What rounding should I choose?
Choose a rounding step that matches your syringe markings. Smaller steps can be more precise. Rounding changes the final milligrams slightly, so review the rounded dose and any daily-limit warnings.
6) How many doses can be given in 24 hours?
This tool limits the count to at most four doses in 24 hours, based on common guidance. Your doctor may recommend a different schedule for specific cases.
7) When should I avoid ibuprofen?
Avoid ibuprofen with NSAID allergy, stomach bleeding, certain kidney problems, or significant dehydration. Seek medical advice if your child has asthma triggered by NSAIDs or is taking other medicines that may interact.
8) Does this replace professional advice?
No. It’s a math helper that uses typical dosing rules. If symptoms are severe, persistent, or your child has chronic conditions, contact a healthcare professional for individualized guidance.