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Estimate adult OTC ibuprofen dosing using common 200–400 mg per dose examples with a 1200 mg/day OTC ceiling reference, or compute pediatric mg/kg doses with typical per-dose and daily teaching limits. Always follow your product label, concentration for liquids, and clinician instructions.
Last updated: April 20, 2026
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Single dose
200 mg
OTC daily ceiling (reference)
800 mg
Often cited as 1200 mg/24 h OTC
Math ceiling only
Up to ~4 equal doses in 24 h if each dose is 200 mg
Real schedules depend on minimum time between doses on the label (often 4–6 h for adults, 6–8 h for many pediatric liquids). Never exceed the labeled maximum or your clinician's instructions.
Ibuprofen is an NSAID and is not appropriate for everyone (kidney disease, certain stomach problems, pregnancy third trimester, some heart conditions, aspirin allergy, interacting drugs). This page does not check interactions or allergies. When in doubt, ask a pharmacist or clinician.
Compares your chosen per-dose milligrams to a widely cited OTC total daily limit. Spacing and contraindications still come from labeling and professional advice.
Multiplies weight by a selected mg/kg factor, rounds, applies a common per-dose cap, and compares to a conservative mg/kg/day ceiling combined with OTC daily limits.
Suspensions vary (for example 100 mg/5 mL vs 50 mg/1.25 mL). Convert milligrams to milliliters using only the concentration printed on your bottle.
200 mg per dose → up to about 6 equal doses could fit under a 1200 mg OTC daily ceiling if spacing and labeling allow—real schedules are usually fewer.
For adults, the tool divides a standard OTC daily milligram ceiling by your selected single dose to show a theoretical dose count. For children, it converts pounds to kilograms when needed, multiplies by your chosen mg/kg factor, rounds to whole milligrams, applies a per-dose cap, and compares daily totals to both mg/kg/day teaching limits and the same OTC ceiling used for older children purchasing OTC products.
weightKg = lb × 0.45359237 (or kg as entered)singleDoseMg = min(400, round(weightKg × mg/kg))dailyMgCeiling = min(1200, round(weightKg × 40))Constants are educational simplifications. Prescription regimens, hospital dosing, and some national labels differ.
See also our maintenance fluid calculator and insulin sliding scale calculator for other inpatient-oriented teaching tools.
Get a Custom Calculator for Your PlatformA pharmacist still needs to translate milligrams to milliliters for your suspension strength and to confirm the schedule matches the child’s age and medical history.
Share it with caregivers and students learning OTC safety
Suggested hashtags: #Ibuprofen #Pediatrics #OTC #MedicationSafety #Calculator