Semaglutide 2 mg reconstituted with 5 mL
Concentration
0.4mg/mL
- Per insulin unit
- 4 mcg
- Solution in vial
- 500 u
- 250 mcg draw
- 62.5 u
Math utility only — not medical advice. Not a recommended dose.
Units per dose at 0.4 mg/mL
Insulin syringes are graduated in hundredths of a millilitre, so units = mL × 100 on a U-100, U-50 or U-30 barrel alike.
| Dose | Volume | U-100 units | Fits | Doses per vial |
|---|---|---|---|---|
| 250 mcg | 0.625 mL | 62.5 u | U-100 | 8 |
| 500 mcg | 1.25 mL | 125 u | split draw | 4 |
| 1 mg | 2.5 mL | 250 u | split draw | 2 |
| 1.7 mg | 4.25 mL | 425 u | split draw | 1 |
Amber rows exceed 100 units — more than one full U-100 barrel. That dose needs a larger draw or a stronger mix (less water).
How this is calculated
1 · Concentration
2 mg ÷ 5 mL = 0.4 mg/mL
The peptide mass never changes — bacteriostatic water only sets how concentrated the solution is, and therefore how far the plunger travels.
2 · Volume for a 250 mcg dose
0.25 mg ÷ 0.4 mg/mL = 0.625 mL
3 · Insulin units
0.625 mL × 100 = 62.5 units
Every unit on the barrel carries 4 mcg at this concentration, so misreading by one unit is a 4 mcg error.
See it on a real syringe
The interactive calculator draws this 0.4 mg/mL mix on a scaled U-100 barrel, shows when a draw lands exactly on a printed tick, and works backwards from a target dose to the water volume that makes it land cleanly.
Open the interactive calculator →Common questions
- How much bacteriostatic water for a 2 mg Semaglutide vial?
- Adding 5 mL of bacteriostatic water to a 2 mg Semaglutide vial yields 0.4 mg/mL — 4 mcg in every insulin unit. The reconstituted vial holds 500 units of solution in total.
- How many units is a 250 mcg dose of Semaglutide at 2 mg in 5 mL?
- 250 mcg is 0.625 mL of this mix, which is 62.5 units on a U-100 insulin syringe (a U-100 barrel is enough).
- How many 250 mcg doses does a 2 mg vial give?
- A 2 mg vial contains 8 full 250 mcg doses. Using more or less bacteriostatic water changes the units you draw, never the number of doses in the vial.