At a glance
| Mark on U-100, 1 mL | Volume | at 1 mg/mL | at 2 mg/mL | at 2.5 mg/mL | at 5 mg/mL | at 10 mg/mL |
|---|---|---|---|---|---|---|
| 5 units | 0.05 mL | 0.05 mg | 0.1 mg | 0.125 mg | 0.25 mg | 0.5 mg |
| 10 units | 0.1 mL | 0.1 mg | 0.2 mg | 0.25 mg | 0.5 mg | 1 mg |
| 20 units | 0.2 mL | 0.2 mg | 0.4 mg | 0.5 mg | 1 mg | 2 mg |
| 25 units | 0.25 mL | 0.25 mg | 0.5 mg | 0.625 mg | 1.25 mg | 2.5 mg |
| 40 units | 0.4 mL | 0.4 mg | 0.8 mg | 1 mg | 2 mg | 4 mg |
| 50 units | 0.5 mL | 0.5 mg | 1 mg | 1.25 mg | 2.5 mg | 5 mg |
| 100 units | 1 mL | 1 mg | 2 mg | 2.5 mg | 5 mg | 10 mg |
Arithmetic at the concentrations shown. The concentration on your own label is the one that counts; enter it in the calculator.
Why the milligrams depend on the pharmacy label
50 units is 0.5 mL, half of a 1 mL insulin syringe and the whole of a 0.5 mL one. In semaglutide that is 0.5 mg at 1 mg/mL, 1 mg at 2 mg/mL, 1.25 mg at 2.5 mg/mL, 2.5 mg at 5 mg/mL and 5 mg at 10 mg/mL. Five milligrams at 10 mg/mL is more than double the highest strength on the Wegovy label, from the same 50 units that means 0.5 mg at 1 mg/mL. That is the widest spread on this site for a single mark, and it comes from the range of concentrations compounding pharmacies use. If you have been told 50 units, ask two things: what the dose is in milligrams, and what the concentration on the vial is. If the two do not multiply to 50 units, one of them is wrong.
The mistake to watch for. A full 0.5 mL syringe is 50 units of anything. It is only a correct semaglutide dose if 50 divided by 100, times your label's mg/mL, equals the milligrams your prescriber wrote.