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Weight-Based Drug Dose Calculator

mg per dose from mg/kg and weight.

Compute the per-dose amount of a drug from a mg-per-kilogram dose and the patient's body weight, plus the total daily amount given a doses-per-day count.

Priya Venkatesan By Priya Venkatesan
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kg
mg/kg
mg

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Per dose = mg_per_kg · weight_kg. Daily total = per_dose · doses_per_day.

In depth

Compute the per-dose amount of a drug from a mg-per-kilogram dose and the patient's body weight, plus the total daily amount given a doses-per-day count.