Last updated: March 2, 2026 by Maria Gonzalez

Weight-Based Medication Dosage Calculator

Formula

Dose (mg) = Weight (kg) x Dose Rate (mg/kg);
Volume (mL) = Dose (mg) / Concentration (mg/mL)

Many medications are dosed based on body weight, especially for children. This calculator helps convert a mg/kg dosing recommendation into the actual dose in milligrams and the volume in milliliters for liquid formulations.

Disclaimer: This calculator is for reference only. Always consult a healthcare professional for medication dosing. Verify the correct dose rate for the specific medication and age group.

Common use cases:

  • Pediatric medication dosing
  • Liquid medication volume calculation
  • Healthcare provider reference tool

Frequently Asked Questions

MG

Maria Gonzalez

Registered Dietitian, RD, MPH

Maria is a Registered Dietitian with a Master's in Public Health. She focuses on evidence-based nutrition assessment tools including BMI, calorie calculations, and body composition analysis.

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