Can I use this to decide how much medicine to give?

No. Use it to check a dose you were already given — by a clinician, the product label, or a pharmacist. When anything disagrees, follow the label and your provider.

How much acetaminophen is too much in a day?

The published ceiling for children is 75 mg/kg/day (up to 4,000 mg); many labels now advise lower maximums. Never combine Tylenol with other acetaminophen-containing products.

Why is ibuprofen risky under 6 months?

Infants that young clear it differently and it can harm the kidneys, especially with dehydration. It is clinician-guided territory only.

What concentration do the mL numbers assume?

Whichever you enter — the common ones are preloaded (acetaminophen 160 mg/5 mL, ibuprofen 100 mg/5 mL, amoxicillin 250 mg/5 mL). Always check your bottle; concentrations differ.

Are Young’s and Clark’s rules still used?

Rarely in practice — weight-based mg/kg dosing is the modern standard. They remain in pharmacy exams, which is why the member shows them with that framing.

My child’s weight is between the label’s ranges. Now what?

Dose by actual weight when the label allows it, and ask a pharmacist when it does not — they answer exactly this question all day.

Pediatric Dose Calculator | Online Calculators Free

What this page is — and is not

This is a reference checker: it converts published pediatric dosing ranges and your clinician's orders into milligram and milliliter numbers, so you can verify what the label or prescription says. It does not choose medicines, and no number here should start a treatment. When a product label and this page disagree, the label and your provider win — every time.

The ranges it uses

Acetaminophen: 10–15 mg/kg per dose, every 4–6 hours, at most 5 doses or 75 mg/kg per day. Ibuprofen: 5–10 mg/kg per dose, every 6–8 hours, at most 40 mg/kg per day, never under 6 months without clinician advice. Both are the ranges printed in standard pediatric references and (in round numbers) on the product labels.

Worked example

A 20 kg child, acetaminophen member.
Range: 10–15 mg/kg × 20 kg = 200–300 mg per dose.
The 160 mg/5 mL suspension maps that to 6.3–9.4 mL.
Cross-check the bottle label before measuring.

How to use it

Pick the medicine or task from the dropdown.
Enter the child’s weight (kg or lb — one is enough).
Read the range, the mL amount, and the 24-hour ceiling.
Confirm against the product label or prescription.