Unit

Also known as “insulin unit”

Last updated August 2026

The graduated markings on an insulin syringe. On a U-100 syringe, 100 units = 1 mL, so each unit is 0.01 mL. Units measure volume, not a fixed amount of peptide.

A frequent source of confusion is treating units as a fixed amount of peptide, when they only measure volume: 10 units is 0.1 mL whether the vial is strong or weak. The actual peptide in those 10 units depends entirely on the concentration set during reconstitution. This is exactly why the calculator asks for vial milligrams and water volume before it can tell you how many units a given dose requires.

Educational reference only — not medical advice. Always follow the guidance of a qualified healthcare professional.