Inputs
mg
ml
mcg
Vial:
Water:
Units assume a U-100 syringe (100 units = 1 ml). This is research math only, not dosing or medical advice.
Results
Units to draw-
Liquid volume per draw-
Concentration-
Per unit-
Draws per vial-
Round physical measurements carefully and follow your lab protocol.
Semaglutide: bac water at a glance
Concentration for a 5 mg vial at common bacteriostatic water volumes. There is no single correct amount — more water means lower concentration and a larger draw.
| Bac water added | Concentration | Per unit (U-100) |
|---|---|---|
| 1 ml | 5 mg/ml | 50 mcg |
| 2 ml | 2.5 mg/ml | 25 mcg |
| 3 ml | 1.67 mg/ml | 16.7 mcg |
| 5 ml | 1 mg/ml | 10 mcg |
Figures are arithmetic for a 5 mg vial and are research math only — not a dose recommendation.
On your phone PepSync runs this same Semaglutide reconstitution math offline and tracks your vials — remaining draws and discard dates. iPhone · $19.99 one-time · coming soon.
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Frequently asked
How much bac water do I add to a 5 mg Semaglutide vial?
The water volume sets the concentration: 5 mg in 1 ml = 5 mg/ml, in 2 ml = 2.5 mg/ml. Most researchers add 1 to 3 ml. Use the calculator above for exact units. See our bac water guide.
Is this dosing advice?
No — it is research concentration math only, with no recommendation about human or veterinary use. For personal health questions, see a licensed clinician.
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