Laboratory calculator
Semaglutide Units Chart (15 mg vial)
Worked example
Worked example: a 15 mg vial of Semaglutide with 2 mL of water has a concentration of 7.5 mg/mL, so a 250 mcg example amount reads 3.3333 units and 500 mcg reads 6.6667 units on a U-100 syringe. With 5 mL the same 250 mcg reads 8.3333 units.
Units chart
| Water added (mL) | Concentration (mg/mL) | Units on a U-100 syringe, by target amount (mcg) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 | 100 | 250 | 500 | 750 | 1000 | 1500 | 2000 | 2500 | 5000 | ||
| 1 | 15 | 0.3 | 0.7 | 1.7 | 3.3 | 5 | 6.7 | 10 | 13.3 | 16.7 | 33.3 |
| 2 | 7.5 | 0.7 | 1.3 | 3.3 | 6.7 | 10 | 13.3 | 20 | 26.7 | 33.3 | 66.7 |
| 3 | 5 | 1 | 2 | 5 | 10 | 15 | 20 | 30 | 40 | 50 | 100 |
| 5 | 3 | 1.7 | 3.3 | 8.3 | 16.7 | 25 | 33.3 | 50 | 66.7 | 83.3 | 166.7 |
How it works
Each cell is units = target amount in mg / concentration x 100, where concentration = vial mass / water volume. For 15 mg in 2 mL the concentration is 7.5 mg/mL, so a 250 mcg example amount is 0.25 / 7.5 x 100 = 3.3333 units.
Frequently asked questions
How many units is 250 mcg of Semaglutide from a 15 mg vial?
It depends on the water volume: 1.6667 units with 1 mL, 3.3333 with 2 mL, 5 with 3 mL and 8.3333 with 5 mL in a 15 mg vial.
Why does adding more water change the unit reading?
More water lowers the concentration, from 15 mg/mL at 1 mL to 3 mg/mL at 5 mL, so the same target amount occupies more volume and reads more units.
How much Semaglutide is in one unit on a U-100 syringe?
One unit is 0.01 mL. At 7.5 mg/mL (the 2 mL row) one unit holds 75 mcg of Semaglutide.