BPC-157 5 mg reconstituted with 3 mL
Concentration
1.67mg/mL
- Per insulin unit
- 16.7 mcg
- Solution in vial
- 300 u
- 500 mcg draw
- 30 u
Math utility only — not medical advice. Not a recommended dose.
Units per dose at 1.67 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 | 0.15 mL | 15 u | U-30 | 20 |
| 500 mcg | 0.3 mL | 30 u | U-30 | 10 |
How this is calculated
1 · Concentration
5 mg ÷ 3 mL = 1.67 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 ÷ 1.67 mg/mL = 0.3 mL
3 · Insulin units
0.3 mL × 100 = 30 units
Every unit on the barrel carries 16.7 mcg at this concentration, so misreading by one unit is a 16.7 mcg error.
See it on a real syringe
The interactive calculator draws this 1.67 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 5 mg BPC-157 vial?
- Adding 3 mL of bacteriostatic water to a 5 mg BPC-157 vial yields 1.67 mg/mL — 16.7 mcg in every insulin unit. The reconstituted vial holds 300 units of solution in total.
- How many units is a 500 mcg dose of BPC-157 at 5 mg in 3 mL?
- 500 mcg is 0.3 mL of this mix, which is 30 units on a U-100 insulin syringe (a U-30 barrel is enough).
- How many 500 mcg doses does a 5 mg vial give?
- A 5 mg vial contains 10 full 500 mcg doses. Using more or less bacteriostatic water changes the units you draw, never the number of doses in the vial.