BPC-157
One vial, many possible marks.
BPC-157 usually arrives as a 5 or 10 mg powder. The units you draw depend entirely on how much water you mixed it with, so the water volume is the number to keep written down.
- Cost
- Free
- Syringe
- U-100
- Signup
- None
- Data
- Nothing stored
The science
Concentration is the only variable that matters
01
A BPC-157 vial is labelled by mass, typically 5 or 10 mg of freeze dried powder. Reconstitution turns that mass into a solution, and the volume of bacteriostatic water you choose decides how concentrated the solution is. Everything downstream follows from that one choice.
02
Take a 5 mg vial. Add 1 ml and it is 5 mg per ml, so a 250 mcg dose is 5 units. Add 2.5 ml and it is 2 mg per ml, so the same 250 mcg dose is 12.5 units. Both are correct. A units figure quoted without its water volume is not information, and that is the single most common source of confusion in this space.
03
The arithmetic is dose divided by concentration, times 100, because a U-100 barrel is graduated so that one unit equals 0.01 ml. Working in micrograms helps here: 250 mcg is 0.25 mg, and keeping one unit throughout avoids the factor of a thousand that trips people up.
04
Choose a water volume that places your dose in a readable part of the barrel. Under two units the graduations are too coarse to trust. Over the barrel capacity you need two injections. Between roughly 10 and 50 units you can see what you are doing, which is worth more than any theoretical precision.
Lookup
5 mg and 10 mg vials, worked through
These are the two presentations BPC-157 is almost always sold in. Every cell is the mark on a U-100 barrel for that combination of water and dose.
5 mg BPC-157 vial
Units on a U-100 syringe
| Dose | 1 ml | 1.5 ml | 2 ml | 2.5 ml | 3 ml |
|---|---|---|---|---|---|
| 100 mcg | 2 | 3 | 4 | 5 | 6 |
| 200 mcg | 4 | 6 | 8 | 10 | 12 |
| 250 mcg | 5 | 7.5 | 10 | 12.5 | 15 |
| 500 mcg | 10 | 15 | 20 | 25 | 30 |
| 1 mg | 20 | 30 | 40 | 50 | 60 |
10 mg BPC-157 vial
Units on a U-100 syringe
| Dose | 1 ml | 1.5 ml | 2 ml | 2.5 ml | 3 ml |
|---|---|---|---|---|---|
| 100 mcg | · | · | 2 | 2.5 | 3 |
| 200 mcg | 2 | 3 | 4 | 5 | 6 |
| 250 mcg | 2.5 | 3.75 | 5 | 6.25 | 7.5 |
| 500 mcg | 5 | 7.5 | 10 | 12.5 | 15 |
| 1 mg | 10 | 15 | 20 | 25 | 30 |
A dot marks a combination that falls under two units or overflows a 100-unit barrel. Both are hard to measure accurately, so they are worth avoiding rather than eyeballing.
Regulatory status
What the FDA actually did in 2023
BPC-157 is not an approved medicine anywhere. Beyond that, the FDA reviewed it for use in pharmacy compounding and placed it in the category reserved for bulk drug substances presenting significant safety risks, which removed the route by which a compounding pharmacy could legitimately supply it in the United States.
It is separately prohibited in tested sport by the World Anti-Doping Agency, and has been since 2022.
The practical consequence is that there is no label to consult and no approved dose to cite, so anyone quoting one is quoting a convention rather than guidance. The figures in the table above are the vial sizes and dose amounts in common circulation. Presenting the arithmetic clearly is not the same as endorsing the inputs, and a clinician is the right person to talk to before acting on any of it.
FAQ
Common questions
How do I calculate BPC-157 units on an insulin syringe?
Divide the vial mass in milligrams by the millilitres of water added, which gives mg per ml. Divide your dose by that figure for the volume in ml, then multiply by 100. A 5 mg vial in 2 ml is 2.5 mg per ml, so a 250 mcg dose is 0.1 ml, or 10 units on a U-100 syringe.
How much bacteriostatic water for a 5 mg BPC-157 vial?
Commonly between 1 and 3 ml, and the choice is about measurement rather than correctness. 2 ml gives 2.5 mg per ml, which puts a 250 mcg dose at 10 units, comfortably readable. Using less water pushes small doses toward the bottom of the barrel where the markings are too coarse to measure well.
Why do two sources give different BPC-157 unit numbers for the same dose?
Almost always because they reconstituted with different water volumes and only one of them said so. Units describe a volume on a barrel, not a mass of peptide. Without the vial size and the water volume, a units figure cannot be reproduced, which is why the calculator asks for both.
Does BPC-157 need to be refrigerated after mixing?
Once reconstituted, peptide solutions are generally kept refrigerated, and bacteriostatic water contains benzyl alcohol specifically to inhibit microbial growth over a period of use. Dry, unmixed powder is more stable than solution. Storage windows vary and the vial expiry tool on this site works out how many doses you can fit inside whatever window you are using.
Is BPC-157 legal or approved?
It is not approved for human use by the FDA or comparable regulators. In 2023 the FDA placed BPC-157 in the category of bulk drug substances that raise significant safety risks, which effectively excludes it from legitimate pharmacy compounding in the United States. It is also prohibited in tested sport. This page converts numbers you supply and does not imply an established human dose exists.
VialClock
This page calculates. Your notes app forgets.
Every tool here is stateless by design. What it cannot do is remember that your vial was mixed eleven days ago, or that a step-up is due this week.
Browse all calculatorsThis tool performs arithmetic on figures you enter, or presents a manufacturer-published schedule. It does not know your protocol, will never suggest a dose, and is not medical advice. Dosing decisions belong with a qualified prescriber.