Introduction
Liquid medicines are dosed by volume, not weight, so the prescribed mg dose must be converted using the product's concentration before it can be measured out and given.
How to use the Liquid Dose Medicine Calculator
- Enter the prescribed dose in mg.
- Enter the liquid's concentration in mg per mL, from the product label.
- Click Calculate to see the exact volume to draw up or measure.
Formula and Calculation Method
Volume (mL) = Prescribed dose (mg) ÷ Concentration (mg/mL)
Visual breakdown
REFERENCE
Round to the smallest graduation your oral syringe supports
Why use this calculator
Liquid dosing errors are among the most common paediatric and veterinary medication mistakes. This calculator removes the mental division step and shows how the required volume shifts for nearby dose adjustments.
FAQs
What if the bottle only lists mg per 5 mL?
Divide that figure by 5 first to get mg per mL, then enter it here.
Should I round the volume?
Round to the nearest graduation your dosing syringe supports, typically 0.1 mL.
Does this work for suspensions that need shaking?
Yes, as long as the labeled concentration reflects the well-mixed suspension.