Pediatric Dosage Calculator (USA)
Calculate safe medication dosages for children based on weight. For educational purposes only.
How Pediatric Dosages are Calculated
Pediatric dosages are calculated using the child's weight and medication concentration:
This formula ensures safe and effective medication administration for children based on their body weight.
- Weight Conversion: 1 lb = 0.453592 kg
- Common Medications: Acetaminophen, Ibuprofen, Antibiotics
- Typical Doses: 10-15 mg/kg for Acetaminophen, 5-10 mg/kg for Ibuprofen
Pediatric Dosage Calculator
Dosage Visualization
Dosage Required
This calculator provides estimates only. Always consult with a pediatrician or pharmacist before administering medication to children. Verify all dosages with a healthcare professional.
- Never exceed recommended maximum doses
- Check expiration dates on medications
- Verify medication concentration (mg/mL)
- Use appropriate measuring devices
- Seek immediate help if overdose suspected
Understanding Pediatric Dosages
Pediatric dosing is weight-based because children's bodies process medications differently than adults. Their organ systems are still developing, and their metabolism rates vary significantly with age and size. Weight-based dosing ensures appropriate medication levels in the bloodstream.
Over-the-Counter Medications
- Acetaminophen: 10-15 mg/kg per dose (every 4-6 hrs)
- Ibuprofen: 5-10 mg/kg per dose (every 6-8 hrs)
- Diphenhydramine: 1 mg/kg per dose (every 6 hrs)
Prescription Medications
- Amoxicillin: 40-90 mg/kg/day divided doses
- Azithromycin: 10 mg/kg once daily
- Cephalexin: 25-50 mg/kg/day divided doses
- Always verify weight in kilograms
- Double-check medication concentration
- Use syringes or dosing cups, not household spoons
- Keep medications out of reach of children
- Never give adult medications to children
- Record all doses given
- Know signs of allergic reactions
Pediatric Dosage Quiz
Select the most important reason:
The correct answer is b) Children's organs and metabolism differ from adults. Pediatric patients have developing organ systems with different processing capabilities, making weight-based dosing essential for safety and efficacy.
Understand the physiological basis for weight-based dosing in pediatrics.
Select the correct range:
The correct answer is b) 10-15 mg/kg per dose. The standard pediatric dose for acetaminophen is 10-15 mg/kg every 4-6 hours as needed.
Memorize common pediatric medication dosages.
Select the correct interval:
The correct answer is c) Every 6-8 hours. The standard dosing interval for pediatric ibuprofen is every 6-8 hours as needed, with a maximum of 4 doses in 24 hours.
Learn appropriate dosing intervals for common pediatric medications.
Q&A
Q: My child weighs 25 lbs. How much acetaminophen should I give?
A: First convert the weight: 25 lbs = 11.3 kg (using 1 lb = 0.453592 kg).
Using the standard acetaminophen dose of 10-15 mg/kg:
- Minimum dose: 11.3 kg × 10 mg/kg = 113 mg
- Maximum dose: 11.3 kg × 15 mg/kg = 170 mg
So you would give approximately 113-170 mg per dose. However, always verify with the medication concentration (e.g., 160 mg/5 mL) and use appropriate measuring devices. Consult your pediatrician for exact dosing.
Q: What's the maximum daily dose of ibuprofen for a 20 kg child?
A: The maximum daily dose of ibuprofen for children is typically 40 mg/kg/day, divided into doses every 6-8 hours.
For a 20 kg child:
- Maximum daily dose: 20 kg × 40 mg/kg = 800 mg/day
- Per dose (if given 3 times daily): 800 mg ÷ 3 = ~267 mg/dose
- Per dose (if given 4 times daily): 800 mg ÷ 4 = 200 mg/dose
Always verify with manufacturer's instructions and consult a pediatrician for specific cases.