Vial Splitting Calculator Info · 21+
Divide a reconstituted vial into equal portions (aliquots) and see the mg and volume in each — e.g. for freeze-thaw planning.
Per aliquot
2.5 mg · 0.5 mL
Concentration
5 mg/mL
For informational use only. Not medical advice. Verify all values independently. 21+.
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How to use this calculator
Enter the total amount in a vial and the number of equal portions you want to divide it into. The calculator shows the amount and, once reconstituted, the volume that corresponds to each portion — handy for planning how a single vial is apportioned across a study.
Worked example
Splitting a 10 mg vial into 4 equal portions gives 2.5 mg each. If that vial were reconstituted to 5 mg/mL, each 2.5 mg portion would correspond to 0.5 mL of solution.
These are laboratory concentration and volume relationships for informational use only — not dosing or medical advice.