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Medication Dosage Calculator.
Calculate safe medication dosages by age, weight, and renal function using Clark's Rule, BSA, or Young's Rule
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Results update as you type.
FAQs
What is Clark's Rule?
Clark's Rule is the most common method for calculating pediatric dosages: Child dose = (Child weight in kg ÷ 70) × Adult dose. Based on a 70 kg average adult.
When should renal function be considered?
Renal function (eGFR) adjustment is important for medications cleared by the kidneys. Ask your pharmacist if your medication requires adjustment.
Is this calculator accurate for all medications?
No. Dosages vary significantly by medication type and individual factors. Always verify with a pharmacist or physician.
Source: FDA Drug Dosing Guidelines & Pediatric Weight-Based Rules (US / International)
Reviewer: Mathify content team
Notice: Dosing estimates do not replace a physician or pharmacist prescription. Always verify with official drug package inserts.