Paracetamol Dosage
Calculate safe paracetamol (acetaminophen) dosage for children and adults by weight and age. WHO-recommended formulas with dosing chart and daily limits.
About This Calculator
Our Paracetamol Dosage Calculator helps you determine the safe and effective dose of paracetamol (also known as acetaminophen) based on the patient's weight and age. Whether you are a parent caring for a child with fever or an adult managing pain, this tool follows the World Health Organization (WHO) guidelines for paracetamol dosing to ensure safety and efficacy.
For children over 3 months, the recommended dose is 10–15 mg per kilogram of body weight per dose, administered every 4–6 hours as needed. The maximum daily dose for children is 60 mg per kg, not exceeding 4 doses in 24 hours. For adults and children over 12 years, standard dosing is 500–1000 mg per dose, with a maximum of 4000 mg in 24 hours. Our calculator uses 15 mg/kg for pediatric single doses (the upper end of the WHO range) and 1000 mg for adult single doses, providing conservative and safe recommendations.
The calculator automatically distinguishes between pediatric and adult dosing based on the entered age. For children under 12, it computes dose from body weight. For ages 12 and above, it applies standard adult dosing. Always wait at least 4 hours between doses, and never exceed the calculated maximum daily limit to avoid the risk of liver toxicity.
Regional Notes
India: Paracetamol is widely available as 500 mg and 650 mg tablets, plus liquid formulations (125 mg/5 ml, 250 mg/5 ml). The Pediatric Association of India follows WHO dosing guidelines. Common brands include Calpol, Crocin, and Sumol.
United States: Known as acetaminophen (Tylenol). Infant and children's suspensions are typically 160 mg/5 ml. The FDA recommends a maximum adult daily dose of 4000 mg, with many healthcare providers advising a lower limit of 3000 mg for chronic use.
United Kingdom: Paracetamol is available as 500 mg tablets and liquid suspensions (120 mg/5 ml for children, 250 mg/5 ml for older children). The NHS recommends checking the concentration on packaging as it varies by brand and formulation.
Frequently Asked Questions
What is the correct paracetamol dosage for children?
The WHO-recommended pediatric paracetamol dose is 10–15 mg per kg of body weight per dose, given every 4–6 hours. The maximum daily dose for children is 60 mg per kg, not exceeding 4 doses in 24 hours. Always consult a doctor for children under 3 months.
What is the maximum paracetamol dose for adults in 24 hours?
The maximum daily paracetamol dose for adults is 4000 mg (4 grams) in 24 hours. A single dose should not exceed 1000 mg (1 gram). For chronic use or in patients with liver disease, the recommended maximum is 2500 mg per day. Never take more than one paracetamol-containing product at the same time.
How often can I give paracetamol to a child?
Paracetamol can be given every 4–6 hours as needed, with a maximum of 4 doses in a 24-hour period. Wait at least 4 hours between doses. If fever or pain persists after 3 days, consult a healthcare provider. Set a timer to avoid accidental double-dosing.
Is paracetamol the same as acetaminophen and Tylenol?
Yes, paracetamol and acetaminophen are the same medication. Paracetamol is the international nonproprietary name (INN) used in most countries outside the US, while acetaminophen is the US Adopted Name (USAN). Tylenol is a common brand name for acetaminophen in the United States and Canada.
Can I give paracetamol to a baby under 3 months?
Paracetamol should only be given to babies under 3 months under medical supervision. The WHO recommends paracetamol for fever only when temperature exceeds 38.5°C (101.3°F). Always consult a pediatrician before medicating newborns and infants under 3 months of age.
What happens if you take too much paracetamol?
Paracetamol overdose is a medical emergency that can cause severe liver damage or failure. Symptoms may not appear for 24 hours and include nausea, vomiting, abdominal pain, and jaundice. If an overdose is suspected, seek emergency medical attention immediately. The antidote is N-acetylcysteine (NAC), which is most effective when given within 8 hours of overdose.
What is the difference between paracetamol and ibuprofen?
Paracetamol (acetaminophen) relieves pain and reduces fever but has minimal anti-inflammatory effects. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that reduces pain, fever, and inflammation. Paracetamol is generally safer for the stomach, while ibuprofen can be alternated with paracetamol for better fever control. Do not alternate without a doctor's guidance.
Can paracetamol be taken on an empty stomach?
Yes, paracetamol can be taken on an empty stomach as it does not irritate the gastric lining like ibuprofen or other NSAIDs. It is absorbed slightly faster on an empty stomach, providing quicker pain relief. Food may delay absorption but does not affect efficacy.