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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
Set your values
Results update as you type.
⚠️ Medical Disclaimer
This calculator is for educational purposes only. Always verify calculations with a pharmacist or physician. Dosages may vary based on medication-specific guidelines, renal/hepatic function, and drug interactions.
Single Dose
clark method (adult)
Daily Total
3x daily (1500 total)
Educational formula example only — use a medication-specific prescription and confirm all dosing with a clinician or pharmacist.
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.