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Medication Dosage Calculator

Weight-based medication dose calculations

💊Medication Dosage Calculator

⚠️ Always verify doses with a licensed pharmacist or physician.

Weight-based dosing calculates medication amounts proportional to a patient's body weight to achieve therapeutic plasma concentrations. Essential for paediatrics, oncology, and narrow therapeutic index drugs.

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Tip: This calculator provides estimates only. Always verify doses against current prescribing guidelines and with a licensed pharmacist before administration.

  1. 1Total dose = weight (kg) × dose per kg (mg/kg)
  2. 2Volume = total dose / concentration
  3. 3Always confirm with British National Formulary (BNF) or pharmacist
  4. 4Round to practical syringe volumes
Child 25kg · amoxicillin 25mg/kg · suspension 250mg/5mL=Dose = 625mg · Volume = 12.5mL25×25=625mg; 625÷50=12.5mL (250mg/5mL=50mg/mL)
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