Enter the amount of drug substance in the vial, the volume of diluent you added, and the mass you intend to measure. The calculator returns the resulting concentration, the draw volume in millilitres, the equivalent mark on an insulin syringe, and how many doses of that size the vial contains. Load a common vial configuration to save typing, or work through it step by step. For full technique, read the reconstitution guide.
Inputs
Presets fill in a common vial size, diluent volume, and reference amount so you can check the arithmetic quickly. They are not dose recommendations.
U-100 barrels are marked 100 units per millilitre.
Enter a vial amount, a diluent volume, and a dose to see results. All three must be greater than zero.
What this tool does and does not do
It converts between mass, volume, and syringe graduations. The presets load a vial size, a diluent volume, and a reference amount that are commonly used for that compound so the arithmetic can be checked quickly — they are configuration shortcuts, not clinical advice, and they do not apply a protocol or account for any individual patient. Nothing is locked: overwrite any field, or choose manual entry to start from an empty form.
The correct amount for a given patient is a clinical decision made by the prescriber and recorded on the prescription. Where the dispensing pharmacy's labeling states a final volume or concentration, the label takes precedence over anything computed here.
Everything is computed in your browser. Nothing entered here is transmitted, stored, or logged.
