Who built this
Built by Alper T., a software developer. I'm not a doctor or pharmacist.
I made GLP Units because converting a prescribed dose in mg into units on an insulin syringe is confusing, especially when a new vial comes in a different strength. The site only does that math; it does not tell anyone what to take.
How the numbers work
- Units = dose (mg) ÷ strength (mg/mL) × 100, for U-100 insulin syringes.
- Dose (mg) = units ÷ 100 × strength.
- Full doses in a vial = vial size (mL) × strength ÷ dose, rounded down.
Every number on every page is produced by the same code that runs the calculator, and that code is covered by automated tests. For example, a test checks that 2.5 mg at 10 mg/mL is 25 units (0.25 mL). Units are shown to 1 decimal place, mL and mg to 3.
Review status
The numbers and wording have not yet been reviewed by a pharmacist. Until they are, please double-check any result with your prescriber or pharmacist.
Last checked: 2026-10-17.
Sources and contact
FDA: dosing errors associated with compounded injectable semaglutide products (July 2024).
Questions or corrections: [email protected].