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Liquid Dose Calculator
Convert an ordered mg dose into mL using the liquid’s concentration (mg/mL).
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Version 1.0.0 · Last reviewed
How it worksShow guide
Introduction
Convert an ordered milligram dose into milliliters using the product concentration (mg/mL). Common for syrups, suspensions, and injectable vials.
Disclaimer: This tool is for informational purposes only and is not professional medical, pharmaceutical, financial, or tax advice. Always verify doses with a licensed clinician or pharmacist.
Formula
Volume to administer equals the ordered dose divided by the liquid concentration.
- V — Volume to give (mL)
- D — Ordered dose (mg)
- C — Concentration (mg/mL)
Step-by-step
- Enter the ordered dose in milligrams.
- Enter the concentration in mg per mL from the label.
- Read the volume to give in milliliters.
Worked example
250 mg ordered from a 50 mg/mL suspension requires 5 mL.
Use cases
- Figure how many mL of a syrup to measure
- Check injectable reconstitution draw-up volumes
- Teach pharmacy technician liquid dose math
Frequently asked questions
What if the label is mg/5 mL?
Convert to mg/mL first. Example: 250 mg/5 mL = 50 mg/mL.
Is rounding included?
Results show up to three decimal places. Follow your site’s rounding and measuring-device policy for the final dispensed volume.
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