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Paracetamol Dosage Calculator

Health

Estimate paracetamol (acetaminophen) dose by body weight for children and adults using standard OTC guidance. Educational reference only, not medical advice.

Reviewed by the thecalcu.com team · Last updated July 29, 2026

3120

Estimated Dose per Administration

900
Maximum in 24 Hours
3,000
Typical Doses per Day
3
Guidance
Give every 4–6 hours as needed, without exceeding the maximum in 24 hours. Some product labels permit higher adult daily limits — always follow the specific product label and consult a pharmacist or doctor.

This calculator computes your Estimated Dose per Administration, Maximum in 24 Hours, Typical Doses per Day, Guidance from the values you enter.

Inputs
Body Weight
Outputs
Estimated Dose per AdministrationMaximum in 24 HoursTypical Doses per DayGuidance

What is a Paracetamol Dosage?

The Paracetamol Dosage Calculator provides an educational, weight-based estimate of paracetamol (acetaminophen) dosing using commonly published OTC guidelines, 15 mg per kilogram of body weight per dose, capped at the standard adult maximum of 1000 mg, given every 4 to 6 hours. Paracetamol is one of the most widely used OTC pain relievers and fever reducers globally, known as acetaminophen in the US and Canada.

This calculator is for general educational reference only and is not medical advice. It does not replace the specific dosing instructions on your product's label and cannot account for individual medical conditions, liver health, or drug interactions. Always confirm with a pharmacist or doctor. For US-branded Tylenol specifically, see the Tylenol Dosage Calculator, and never combine paracetamol/acetaminophen with other products containing the same ingredient.

Why Use a Paracetamol Dosage Calculator?

Paracetamol dosing charts vary by country, product concentration, and age group, and manually working through a weight-based calculation while unwell (or caring for someone who is) is exactly when small errors happen. This calculator applies the standard weight-based formula as a quick reference point to compare against your specific product's label.

It's especially useful for households that stock multiple paracetamol-containing products (cold medicines often include it as an ingredient), where the real risk is accidental double-dosing across products rather than getting a single dose wrong.

Who Should Use This Calculator?

  • Adults and caregivers double-checking a weight-based paracetamol dose against a product label.
  • International travellers and expats navigating paracetamol dosing conventions that may differ from what they're used to.
  • Households managing multiple family members' medications who want a consistent weight-based reference point.

This tool does not replace guidance from a doctor, pharmacist, or the product label itself.

What Insights Does This Calculator Give You?

The Estimated Dose per Administration shows the weight-scaled amount, capped at the standard adult single-dose maximum. The Maximum in 24 Hours shows a conservative daily ceiling. The Guidance field flags cautions like very low weight requiring direct doctor guidance before dosing.

None of these outputs are a prescription or medical recommendation, they're a standard-formula reference point to compare against your product's actual label.

How to use this Paracetamol Dosage calculator

  1. Enter the Body Weight in kilograms as precisely as you can measure it.
  2. Review the Estimated Dose per Administration.
  3. Check the Maximum in 24 Hours to confirm you're not exceeding the daily ceiling, especially if you're also taking other products containing paracetamol.
  4. Read the Guidance field for cautions.
  5. Confirm your final dose against the actual product label, and consult a pharmacist or doctor with any questions.

Formula & Methodology

Dose (mg) = min(Weight [kg] × 15, 1000)

Maximum Daily (mg) = min(Weight [kg] × 75, 3000)

Worked example, for a 60 kg adult:

Dose = 60 × 15 = 900 mg per administration (below the 1000 mg cap)
Maximum Daily = 60 × 75 = 4500 mg, capped at 3000 mg

This is a general educational estimate based on common OTC guidelines, always verify against your specific product's label and consult a pharmacist or doctor.

Frequently Asked Questions

A commonly cited guideline is 15 mg per kilogram of body weight per dose, capped at the standard adult single-dose amount of 1000 mg, given every 4 to 6 hours as needed. This is a general educational reference, always confirm the specific dose against your product's label.
A conservative commonly cited daily maximum is 3000 mg for adults, though some product labels permit up to 4000 mg, always follow the specific product label rather than assuming one universal limit, and consult a pharmacist if you're unsure.
Paracetamol is the name used in the UK, Europe, India, and most of the world, while acetaminophen is the name used in the US and Canada for the exact same active ingredient. Products like Tylenol use the acetaminophen name specifically.
A typical guideline allows dosing every 4 to 6 hours, without exceeding the daily maximum, this usually works out to about 4 doses in 24 hours at the standard interval. Always check your specific product's label for exact frequency guidance.
Paracetamol and ibuprofen work through different mechanisms and are sometimes used together or alternated under medical guidance, but this should only be done with a doctor or pharmacist's specific direction. See the [Ibuprofen Dosage Calculator](/ibuprofen-dosage-calculator/) for the other medication's estimate, but don't combine them without professional guidance.
The weight-based formula scales for both children and adults, though for infants and young children specifically, the [Infant Tylenol Dosage Calculator](/infant-tylenol-dosage-calculator/) uses a formulation-specific formula that may better match infant/children's product concentrations.
Early paracetamol overdose can show few obvious symptoms, which is part of why accurate dosing matters, later signs can include nausea, vomiting, and abdominal pain. If you suspect an overdose, contact poison control or emergency services immediately rather than waiting for symptoms to develop.
1000 mg is the standard adult single-dose maximum on most OTC paracetamol labels, so the calculator caps the weight-scaled result there rather than projecting an ever-increasing dose for very heavy individuals.
Yes, paracetamol is processed by the liver, and people with liver conditions or who consume alcohol regularly may need a lower maximum dose than the general guideline suggests. Always disclose any liver conditions to a doctor or pharmacist before taking paracetamol regularly.
No, this tool provides a general educational estimate based on common OTC guidelines, but the specific product you have may differ in concentration, formulation, or country-specific labeling. Always read and follow the label on the specific product you're using.
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