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Child Dose Calculator

Calculate accurate pediatric medication dosages from standard adult doses using three distinct clinical methodologies: Young's Rule, Clark's Rule, and Body Surface Area (BSA).

Patient Parameters

500 MG
6 YRS
20 KG
110 CM

CANVATOOLS

Pediatric Pharmacy

Dosing Guidelines

Jul 29, 2026, 08:31 PM

ID: PED-812786

Patient Name

Baby Doe

Most Accurate

BSA Method Dose

226

mg / dose

Clark's Rule

147 mg

Weight Based

Young's Rule

167 mg

Age Based

Pharmacokinetics Profile

Target Adult Dose500 mg
Child's Weight20 kg (44.1 lbs)
Child's Height110 cm
Calculated BSA0.78

Caution: For educational reference only. Always verify pediatric dosages against a pharmacopoeia before administration.

*** End of Report ***

Clinical Precision & Methodology

Calculating pediatric dosages from adult prescriptions requires care. This tool implements three distinct formulas to provide a comprehensive dosing profile, with the Body Surface Area (BSA) method highlighted as the most clinically robust.

BSA / Mosteller Method

The Body Surface Area equation accurately scales physiological and metabolic processes. It is considered the gold standard for adjusting drug doses across different human sizes.

Clark's & Young's Rules

Includes Clark's Rule (based on patient weight relative to a 150lb adult) and Young's Rule (based on chronological age) for cross-referencing and historical compatibility.

Thermal Receipt Export

Generates a high-resolution, perfectly scaled PNG image designed specifically for 80mm thermal printers, enabling instant clinical handouts.

Formula Reference

BSA Method (Standard)(Patient BSA / 1.73m²) × Adult DoseBSA = √((cm × kg) / 3600)
Clark's Rule(Weight in lbs / 150) × Adult Dose
Young's Rule(Age in years / (Age + 12)) × Adult Dose