Quick answer: To convert a Semaglutide dose to units, divide your vial size (mg) by the bacteriostatic water (mL) to get the concentration, then units = (dose ÷ concentration) × 100. A 1mg dose from a 5mg vial in 3mL is 60 units on a U-100 syringe.
Semaglutide dosing in units, explained
When you reconstitute a Semaglutide vial, your dose in milligrams (mg) has to be converted into units on a U-100 insulin syringe before you can draw it. There is no single conversion: the same 1 mg dose is a different number of units depending on how much bacteriostatic water you added, because that sets the concentration. The calculator above does this for your exact vial; the reference table below covers the most common setups.
This is also why a generic chart can mislead you: a unit count only means something once it is tied to your concentration. Always confirm the number against your own vial before drawing.
Semaglutide dose-to-units reference (5 mg vial)
| Dose | 5.0 mg/mL (5mg + 1mL) |
2.5 mg/mL (5mg + 2mL) |
|---|---|---|
| 0.25 mg | 5.0 units (0.05 mL) | 10.0 units (0.1 mL) |
| 0.5 mg | 10.0 units (0.1 mL) | 20.0 units (0.2 mL) |
| 1 mg | 20.0 units (0.2 mL) | 40.0 units (0.4 mL) |
| 1.7 mg | 34.0 units (0.34 mL) | 68.0 units (0.68 mL) |
| 2.4 mg | 48.0 units (0.48 mL) | 96.0 units (0.96 mL) |
Any result over 100 units exceeds a single U-100 syringe. Use a higher concentration (less water) or split the dose into two draws.
Worked example
Take a 5 mg vial and add 1 mL of bacteriostatic water. That gives 5.0 mg/mL. For a 1 mg dose: (1 ÷ 5.0) × 100 = 20.0 units on a U-100 syringe (0.2 mL). Draw to that mark.
Frequently asked questions
How do you convert a Semaglutide dose in mg to insulin syringe units?
Find your concentration: divide the vial size (mg) by the bacteriostatic water added (mL). Then units = (dose ÷ concentration) × 100. A 5mg vial in 2mL is 2.5 mg/mL, so a 1mg dose = 40.0 units.
How many units is my Semaglutide dose?
It depends entirely on how you reconstituted the vial. The same mg dose can be a different number of units depending on the water volume you used. Enter your exact vial size, water, and dose above for the precise answer.
What is a U-100 insulin syringe unit in mL?
On a U-100 syringe, 100 units = 1 mL. So 50 units = 0.5 mL, 20 units = 0.2 mL, and 10 units = 0.1 mL.
Safety: Semaglutide is the active ingredient in FDA-approved GLP-1 medications. This tool is educational only. Always double-check your own math and follow a licensed provider's instructions before injecting.