Semaglutide 3 mg reconstituted with 5 mL
Concentration
0.6mg/mL
- Per insulin unit
- 6 mcg
- Solution in vial
- 500 u
- 500 mcg draw
- 83.3 u
Math utility only — not medical advice. Not a recommended dose.
Units per dose at 0.6 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 | 0.417 mL | 41.7 u | U-50 | 12 |
| 500 mcg | 0.833 mL | 83.3 u | U-100 | 6 |
| 1 mg | 1.667 mL | 166.7 u | split draw | 3 |
| 1.7 mg | 2.833 mL | 283.3 u | split draw | 1 |
| 2.4 mg | 4 mL | 400 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
3 mg ÷ 5 mL = 0.6 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 500 mcg dose
0.5 mg ÷ 0.6 mg/mL = 0.833 mL
3 · Insulin units
0.833 mL × 100 = 83.3 units
Every unit on the barrel carries 6 mcg at this concentration, so misreading by one unit is a 6 mcg error.
See it on a real syringe
The interactive calculator draws this 0.6 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 3 mg Semaglutide vial?
- Adding 5 mL of bacteriostatic water to a 3 mg Semaglutide vial yields 0.6 mg/mL — 6 mcg in every insulin unit. The reconstituted vial holds 500 units of solution in total.
- How many units is a 500 mcg dose of Semaglutide at 3 mg in 5 mL?
- 500 mcg is 0.833 mL of this mix, which is 83.3 units on a U-100 insulin syringe (a U-100 barrel is enough).
- How many 500 mcg doses does a 3 mg vial give?
- A 3 mg vial contains 6 full 500 mcg doses. Using more or less bacteriostatic water changes the units you draw, never the number of doses in the vial.