BPC-157 Reconstitution Calculator (mg → units)
A 10 mg vial of BPC-157 mixed with 2 mL of bacteriostatic water holds 5,000 mcg/mL, so a 250 mcg dose is 0.05 mL — 5 units on a U-100 insulin syringe. Change the vial, water or dose below, or read the chart for other mixes.
BPC-157 dilution chart: 250 mcg in units
| Vial | + 1 mL water | + 2 mL water | + 3 mL water | Doses per vial |
|---|---|---|---|---|
| 5 mg | 5 U 0.05 mL · 5,000 mcg/mL | 10 U 0.1 mL · 2,500 mcg/mL | 15 U 0.15 mL · 1,667 mcg/mL | 20 |
| 10 mg | 2.5 U 0.025 mL · 10,000 mcg/mL | 5 U 0.05 mL · 5,000 mcg/mL | 7.5 U 0.075 mL · 3,333 mcg/mL | 40 |
1 mL = 100 units on a U-100 syringe. Water volume changes the units per dose, never the number of doses in the vial.
Measuring BPC-157: the math that matters
BPC-157 is sold as a dry powder, usually in 5 mg or 10 mg vials, while doses are written in micrograms. That gap between milligrams on the label and micrograms in the protocol is where most measuring errors start. With a 10 mg vial and 2 mL of bacteriostatic water, every millilitre holds 5,000 mcg, so 250 mcg is 0.05 mL, or 5 units on a U-100 insulin syringe. With a 5 mg vial and the same 2 mL, the concentration halves and the same 250 mcg becomes 10 units.
Small draws are the practical problem. A 10 mg vial mixed with only 1 mL puts 250 mcg at 2.5 units. Most 1 mL insulin syringes are marked every 2 units, so 2.5 units falls between lines, and reading one line too high gives 4.5 units instead of 2.5, almost double. Adding more water spreads the same dose across more of the barrel: with 3 mL, 250 mcg sits at 7.5 units. Smaller 0.3 mL and 0.5 mL syringes usually have finer markings, which helps when the draw is under 10 units.
The water volume never changes how much BPC-157 is in the vial, only how much liquid carries it. A 10 mg vial holds 40 doses of 250 mcg whether you add 1 mL or 3 mL. What changes is units per draw: 2.5, 5 or 7.5. Choose the volume before you mix, write the resulting concentration on the vial, and redo the math whenever you switch vial sizes, because a 5 mg and a 10 mg vial look identical once they are liquid.
Reconstituted peptides are generally kept in the fridge and out of light, and a seller's shelf-life figure is an estimate rather than a tested number for that vial. The injection guide linked below walks through mixing and storage.
Common BPC-157 measuring mistakes
- Typing 250 into the dose field with the unit set to mg. That is 250,000 mcg, a thousand times the intended amount.
- Assuming every vial is 5 mg. Moving to a 10 mg vial with the same water volume halves the units for the same dose.
- Counting syringe lines as units. On a 1 mL U-100 syringe each small line is usually 2 units, not 1.
- Squirting the water straight onto the powder and shaking. Run it down the side of the vial and swirl gently.
- Not labelling the vial with its concentration, then guessing weeks later which mix it was.