mg/kg Medication Dosage Calculator

How to calculate mg/kg dosage?

Weight-based dosing ensures patients receive the correct amount of medication relative to their body mass, which is critical in pediatrics and critical care.

Formula: Dose (mg) = Weight (kg) × Dosage Rate (mg/kg)

Using the Dosage calculator: an example

Example: A patient weighing 44 lbs is prescribed a medication at 15 mg/kg.

Step-by-step calculation:

1. Convert weight to kg (44 lb / 2.2046 = 20 kg).
2. Multiply weight by rate (20 kg × 15 mg/kg).
3. Final dose is 300 mg.

Frequently Asked Questions

Why is weight-based dosing important?

It accounts for physiological differences in metabolism and distribution, preventing under-dosing or toxicity.

Can I use this for liquid medications?

Yes, once you have the total mg dose, divide it by the concentration (mg/mL) to find the required volume.