On a U-100 insulin syringe, 0.5 mg of semaglutide is 50 units at 1 mg/mL, 25 units at 2 mg/mL, 20 units at 2.5 mg/mL, 12.5 units at 4 mg/mL, 10 units at 5 mg/mL, 5 units at 10 mg/mL.
At 2.5 mg/mL, the strength most often seen on compounded labels, it is 0.2 mL, which is 20 units. Use the calculator with the strength printed on your own vial.
0.5 mg of semaglutide in units at every strength
| Vial strength | Volume | Units (U-100) |
|---|---|---|
| 1 mg/mL | 0.5 mL | 50 units |
| 2 mg/mL | 0.25 mL | 25 units |
| 2.5 mg/mL | 0.2 mL | 20 units |
| 4 mg/mL | 0.125 mL | 12.5 units |
| 5 mg/mL | 0.1 mL | 10 units |
| 10 mg/mL | 0.05 mL | 5 units |
Dose ↔ units
How long will my vial last?
Uses the vial and dose from the calculator above.
Real vials can hold slightly more or less than the label says, and a little is lost in the needle.
Get the GLP Units app
A phone app for compounded GLP-1 users: vial tracker, injection log and side-effect notes.
Get the GLP Units app: Android first, iPhone later. Join the waitlist and we'll email you at launch.
Same dose, different units
At 2.5 mg/mL, 0.5 mg is 20 units. Drawing those same 20 units from a 5 mg/mL vial gives 1 mg, not 0.5 mg. Always check the mg/mL on the vial you are using.
In July 2024 the FDA warned about dosing errors with compounded semaglutide, including mix-ups between mg, mL and units (FDA alert). The same math applies to any vial.
Questions
How many mL is 0.5 mg of semaglutide?
It depends on the vial: 0.5 mL at 1 mg/mL, 0.25 mL at 2 mg/mL, 0.2 mL at 2.5 mg/mL, 0.125 mL at 4 mg/mL, 0.1 mL at 5 mg/mL, 0.05 mL at 10 mg/mL.
Is 0.5 mg of semaglutide the same number of units on every vial?
No. The units depend on the strength printed on the vial: 50 units at 1 mg/mL, 25 units at 2 mg/mL, 20 units at 2.5 mg/mL, 12.5 units at 4 mg/mL, 10 units at 5 mg/mL, 5 units at 10 mg/mL.
More charts
- Semaglutide 1 mg/mL chart
- Semaglutide 2 mg/mL chart
- Semaglutide 2.5 mg/mL chart
- Semaglutide 4 mg/mL chart
- Semaglutide 5 mg/mL chart
- Semaglutide 10 mg/mL chart