20 units of semaglutide is how many mg?
At 2.5 mg/mL, 20 units of semaglutide is 0.5 mg. At 5 mg/mL, it's 1 mg.
Dose calculator
MG → UNITSmg/mL
mg
Use the concentration on your semaglutide vial label — pharmacies differ.
Your conversion
—units on a U-100 syringe
Enter your values to see the math.
Educational only. Always follow your prescriber's dose and confirm the numbers with your pharmacist.
20 units in mg, by vial strength
| Vial concentration | Dose | Volume |
|---|---|---|
| 2.5 mg/mL | 0.5 mg | 0.2 mL |
| 5 mg/mL | 1 mg | 0.2 mL |
Why the answer depends on your vial
Units on an insulin syringe measure volume: 100 units = 1 mL, so 20 units is always 0.2 mL. How many milligrams that volume holds depends on the concentration printed on your vial label.
The formula
mg = (units ÷ 100) × concentration mg/mL
Example at 2.5 mg/mL: 20 ÷ 100 × 2.5 = 0.5 mg.
Brand-name Wegovy and Ozempic pens deliver fixed doses in mg — you don't count units with a pen. These numbers apply to vials drawn up with a syringe. Always follow your prescriber and your pharmacy label.