BPC-157 Reconstitution Calculator
BAC water, concentration & dose-to-units charts
Work out how much bacteriostatic water to add to a BPC-157 vial and what each microgram dose becomes in syringe units — for example, a 5 mg vial in 2 mL of water is 2.5 mg/mL, so a 250 mcg dose is 0.1 mL, or 10 units on a U-100 syringe. BPC-157 is a research peptide and is not FDA approved; this page handles reconstitution math only.
How BPC-157 reconstitution works
BPC-157 is supplied as a freeze-dried (lyophilized) powder that you dissolve with bacteriostatic water before measuring a dose. The concentration is simply the vial strength divided by the water you add — a 5 mg vial in 2 mL is 2.5 mg/mL.
Because BPC-157 doses are small (typically a few hundred micrograms), the goal is a concentration that turns your dose into an easy-to-read number of units. Dose volume is the dose divided by the concentration, and on a U-100 insulin syringe that volume × 100 gives the unit marks to draw. Remember 1 mg = 1000 mcg.
Reconstitution chart: concentration by BPC-157 vial size and water added
| Vial size | +1 mL | +2 mL | +3 mL | +5 mL |
|---|---|---|---|---|
| 5 mg | 5 mg/mL | 2.5 mg/mL | 1.67 mg/mL | 1 mg/mLBest |
| 10 mg | 10 mg/mL | 5 mg/mL | 3.33 mg/mL | 2 mg/mL |
BPC-157 dose to syringe units (by concentration)
| Dose | 1 mg/mL | 2.5 mg/mL | 5 mg/mL |
|---|---|---|---|
| 200 mcg | 0.2 mL → 20 | 0.08 mL → 8 | 0.04 mL → 4Best |
| 250 mcg | 0.25 mL → 25 | 0.1 mL → 10 | 0.05 mL → 5 |
| 300 mcg | 0.3 mL → 30 | 0.12 mL → 12 | 0.06 mL → 6 |
| 500 mcg | 0.5 mL → 50 | 0.2 mL → 20 | 0.1 mL → 10 |
How to reconstitute a BPC-157 vial
Storage & safety
Bacteriostatic water contains benzyl alcohol as a preservative, so a reconstituted vial can be used for multiple draws; keep it refrigerated and labeled with its concentration and date. Reconstituted peptides are generally more stable cold and used within a few weeks.
This page is educational and only handles the reconstitution and unit math. BPC-157 is not an approved medication, so decisions about whether to use it belong with a qualified healthcare professional, and you should verify any vial’s real content (see our peptide-testing guide) before relying on the label.
Frequently Asked Questions
5 mg in 1 mL is 5 mg/mL; in 2 mL is 2.5 mg/mL; in 5 mL is 1 mg/mL. For small 250–500 mcg doses, 2 mL (2.5 mg/mL) is a common choice because it makes a 250 mcg dose exactly 10 units. Use the chart above.
At 2.5 mg/mL, 250 mcg is 0.1 mL, or 10 units on a U-100 insulin syringe. At 5 mg/mL it is 0.05 mL (5 units). Units = (dose ÷ concentration) × 100, with the dose converted to mg (250 mcg = 0.25 mg).
Add bacteriostatic water down the vial wall, swirl gently until clear (do not shake), then label with the concentration and date and refrigerate. Use the step-by-step guide and chart above.
A lower concentration like 1–2.5 mg/mL turns small mcg doses into a readable number of units; 2.5 mg/mL is popular because 250 mcg lands on exactly 10 units.
Yes. Shotlee stores your vial concentration, logs each dose, and sends reminders so you do not have to recompute. It is free.
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