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  • Vial or pen: choosing a format for your lab

Free research tool

Reconstitution calculator

Work out the concentration after adding liquid to a vial, and the volume that contains an amount you enter. This tool does concentration and volume maths only. It does not recommend a dose or how often to use any product.

mg
mL
Only enter an amount you already have from an appropriate professional or the product instructions. This tool does not suggest amounts.
Syringe markings are shown only when you select the matching scale.

Result

5 mg/mLConcentration = vial amount ÷ liquid volume (5,000 mcg/mL)
0.5 mgAmount in 0.1 mL. A volume conversion, not a recommended amount.

Concentration and volume maths only. This calculator does not recommend a dose or how often to use any product. For research purposes only.

Example chart

Each cell shows concentration (mg/mL) / amount in 0.1 mL (mg). The 0.1 mL figure is a volume conversion, not a recommended dose. The calculator above works with any values.

Vial amountAdd 1 mLAdd 2 mLAdd 3 mL
5 mg5 / 0.502.5 / 0.251.67 / 0.167
10 mg10 / 1.005 / 0.503.33 / 0.333
20 mg20 / 2.0010 / 1.006.67 / 0.667
40 mg40 / 4.0020 / 2.0013.33 / 1.333
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