Use the actual amount of diluent added to the vial.
Enter vial amount, BAC water, and dose to calculate the syringe draw.
Quick converters
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Reconstitution reference
On a U-100 insulin syringe, 100 units equals 1 mL. Once vial concentration is known, the calculator converts your prescribed dose into the matching syringe draw.
Concentration (mg/mL) = vial mg ÷ BAC water mL
Syringe units = dose mg ÷ concentration × 100
Always confirm the vial strength, diluent volume, medication label, and prescribed dose before use.