Pediatric Dose Calculator

Weight-based and BSA-based medication dosing

Formula

Dose = Weight (kg) × mg/kg. Daily dose = Weight × mg/kg/day. BSA dose = BSA (m²) × mg/m². Mosteller BSA = √(ht×wt/3600).

Pediatric dosing is weight-based (mg/kg) or body surface area-based (mg/m²). Always check maximum doses and verify with current pediatric references. This calculator is for educational use only.

How to Calculate Manually

1
Select dosing method
2
Enter child's weight (and height for BSA)
3
Enter dose per kg or select drug from list
4
Enter max dose if applicable
5
Calculator shows dose per dose and daily total

Reference Table

Drug	Typical Dose	Frequency	Max Dose
Amoxicillin	50 mg/kg/day	TID	1000 mg
Augmentin	90 mg/kg/day	BID	875 mg
Azithromycin	10 mg/kg day 1	QD	500 mg
Cephalexin	50 mg/kg/day	QID	1000 mg
Ibuprofen	10 mg/kg/dose	Q6-8H	400 mg
Acetaminophen	15 mg/kg/dose	Q4-6H	650 mg
Prednisolone	1-2 mg/kg/day	BID	60 mg

Pediatric Dose Calculator: Weight-Based Medication Dosing

Pediatric medication dosing is fundamentally different from adult dosing. Children are not small adults—their pharmacokinetics (absorption, distribution, metabolism, excretion) vary dramatically with age and development. Weight-based dosing (mg/kg) is the standard for most medications, while body surface area (BSA) dosing is used for chemotherapy and certain critical care drugs...

Frequently Asked Questions

How do I calculate pediatric dose? Dose = Weight (kg) × Dose per kg. Or Dose = BSA (m²) × Dose per m². Always verify with pediatric dosing reference.: Dose = Weight (kg) × Dose per kg. Or Dose = BSA (m²) × Dose per m². Always verify with pediatric dosing reference.
What's the max pediatric dose? Never exceed adult dose. Many drugs have max daily dose caps. Check specific drug monographs.: Never exceed adult dose. Many drugs have max daily dose caps. Check specific drug monographs.
mg/kg vs mg/m² - which to use? mg/kg for most drugs. mg/m² (BSA-based) for chemotherapy and some critical care drugs. BSA = √(ht×wt/3600).: mg/kg for most drugs. mg/m² (BSA-based) for chemotherapy and some critical care drugs. BSA = √(ht×wt/3600).

Calculator

Formula

Formula

How to Calculate Manually

Reference Table

Pediatric Dose Calculator: Weight-Based Medication Dosing

Frequently Asked Questions

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