Weight-based dose calculator (mg/kg)

Enter your values. The answer and the full worked solution update as you type.

Result

Dose per administration240 mg

Volume per dose4.8 mL

Daily dose720 mg

Always compare the dose with the safe dose range and the maximum dose on the label: a weight-based dose must not exceed the adult maximum. For exam practice only. This is a study aid, never a clinical decision: always follow the prescription, local protocols and the product information.

Step-by-step solution

Daily dose

18 kg · 40 mg/kg/day = 720 mg/day

Per dose

720/3 = 240 mg

240 mg / 50 mg/mL = 4.8 mL

Key formulas

Weight-based dose: dose = mg/kg × body weight
Units: 1 g = 1000 mg, 1 mg = 1000 mcg

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