Enter your BPC-157 vial size and the volume of bacteriostatic water you are adding. The calculator returns the concentration in mcg/ml and the exact number of units to draw on a U-100 insulin syringe. It works for the common 5mg and 10mg vials at any dose.
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Results
Concentration
2500 mcg/ml
2.5 mg/ml
Volume to inject
0.1 ml
per dose
Units on insulin syringe (U-100)
10 units
on a standard 100-unit insulin syringe
Doses per vial
20 doses
at 250 mcg each
How this is calculated
5mg × 1,000 = 5000 mcg total
5000 ÷ 2ml = 2500 mcg/ml
250 mcg ÷ 2500 = 0.1 ml
0.1 ml × 100 = 10 units
Disclaimer: This calculator is provided for informational purposes only. Always verify results against your specific vial labelling before use. Peptidy does not provide medical advice — consult a qualified healthcare professional before beginning or modifying any protocol. Use of research peptides may be subject to legal restrictions in your jurisdiction.
BPC-157 is a research peptide typically dosed daily in the 200–500mcg range for recovery and gut-health protocols. Because the doses are small, drawing the right number of units on an insulin syringe depends entirely on getting the reconstitution concentration right first.
Ranges commonly reported in research-peptide use. BPC-157 is sometimes injected subcutaneously near the site of an injury and sometimes in the abdomen; the dose is the same either way.
| Low daily dose | 200 mcg once daily |
| Common daily dose | 250 mcg once daily |
| Higher daily dose | 500 mcg once daily (or 250mcg twice daily) |
Worked example: 5mg vial + 2ml BAC water, 250mcg dose
2ml is the most common choice, giving 2,500 mcg/ml. A 250mcg dose is then 0.1ml = 10 units on a U-100 insulin syringe. If you prefer a smaller injection volume, use 1ml for 5,000 mcg/ml, which halves the dose volume to 5 units.
At 2,500 mcg/ml (5mg vial + 2ml BAC water): 250 ÷ 2,500 = 0.1ml = 10 units. At 5,000 mcg/ml (5mg + 1ml): 250 ÷ 5,000 = 0.05ml = 5 units. Enter your vial size and water volume above for an exact figure.
At a 250mcg daily dose a 5mg vial provides 20 doses — just under three weeks of daily use. At 500mcg daily it provides 10 doses. A 10mg vial doubles both figures.
Stored in bacteriostatic water and refrigerated at 2–8°C away from light, reconstituted BPC-157 typically remains viable for 4–6 weeks. Label the vial with the reconstitution date and do not freeze it — freeze-thaw cycles degrade the peptide.
Both approaches are used. Some people inject subcutaneously close to the injury site on the theory that local delivery concentrates the effect; others inject in the abdomen for convenience. The reconstitution maths and the units you draw are identical either way.
Store your vial concentration, log every dose against it, and never lose track of what you injected or when.