Weight-Based Medication Dosage Calculator
Calculate weight-based medication doses for adults and paediatric patients. Enter the patient's weight, the prescribed dose rate in mg/kg, and administration frequency to calculate single-dose and total daily amounts. For reference only — always verify with a pharmacist or physician.
Key Capabilities
What is weight-based dosing?
Weight-based dosing calculates medication doses proportional to body weight (mg/kg). This is standard practice in paediatric medicine and for drugs with narrow therapeutic indices. Adult doses are usually fixed, but weight-based calculation is still used for antimicrobials, anticoagulants, and chemotherapy.
How do I find the mg/kg dose for a drug?
The mg/kg dose is specified on the drug package insert, British National Formulary (BNF), or prescribing information leaflet. Common examples: amoxicillin 25 mg/kg/day in children, paracetamol 15 mg/kg per dose. Always use the prescribed dose from your doctor or pharmacist.
Is this calculator a substitute for a pharmacist?
No. This tool performs basic arithmetic only and cannot account for renal impairment, hepatic function, drug interactions, loading doses, or individualised clinical factors. Always verify calculated doses with a licensed pharmacist or prescribing physician before administration.
How to Use
Upload your medical document
Open the Medication Dosage Calculator tool and upload your medical document (prescription, lab report, or medical record). Your data stays in your browser — zero server uploads.
AI analysis begins
The tool analyzes your document using specialized medical OCR models trained on healthcare documents. This typically takes 3-8 seconds.
Review extracted information
Review the structured medical information extracted from your document. Copy results or download for your records.
Frequently Asked Questions
What is weight-based dosing?
Weight-based dosing calculates medication doses proportional to body weight (mg/kg). This is standard practice in paediatric medicine and for drugs with narrow therapeutic indices. Adult doses are usually fixed, but weight-based calculation is still used for antimicrobials, anticoagulants, and chemotherapy.
How do I find the mg/kg dose for a drug?
The mg/kg dose is specified on the drug package insert, British National Formulary (BNF), or prescribing information leaflet. Common examples: amoxicillin 25 mg/kg/day in children, paracetamol 15 mg/kg per dose. Always use the prescribed dose from your doctor or pharmacist.
Is this calculator a substitute for a pharmacist?
No. This tool performs basic arithmetic only and cannot account for renal impairment, hepatic function, drug interactions, loading doses, or individualised clinical factors. Always verify calculated doses with a licensed pharmacist or prescribing physician before administration.
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