BPC-157 Dosage in mL: How to Calculate Your Injection Volume

Why the Dose Is in mcg but the Syringe Reads mL

BPC-157 doses are prescribed in micrograms (mcg), but your syringe measures in milliliters (mL) or units (IU). To bridge the gap, you need one piece of information: the concentration of your reconstituted solution.

The concentration depends on two things:

• How much BPC-157 is in your vial (typically 5 mg or 10 mg)
• How much bacteriostatic water you added

Once you know the concentration, converting mcg to mL is simple division.

The Core Formula

Volume to inject (mL) = Desired dose (mcg) / Concentration (mcg/mL)

And the concentration formula:

Concentration (mcg/mL) = Total peptide in vial (mcg) / Water added (mL)

Remember: 1 mg = 1,000 mcg. So a 5 mg vial contains 5,000 mcg.

Example Calculations: 5 mg Vial

Here are the concentrations and injection volumes for a standard 5 mg BPC-157 vial:

With 1 mL of BAC Water Added

• Concentration: 5,000 mcg / 1 mL = 5,000 mcg/mL
• 250 mcg dose = 250 / 5,000 = 0.05 mL (5 units)
• 500 mcg dose = 500 / 5,000 = 0.10 mL (10 units)

With 2 mL of BAC Water Added

• Concentration: 5,000 mcg / 2 mL = 2,500 mcg/mL
• 250 mcg dose = 250 / 2,500 = 0.10 mL (10 units)
• 500 mcg dose = 500 / 2,500 = 0.20 mL (20 units)

With 3 mL of BAC Water Added

• Concentration: 5,000 mcg / 3 mL = 1,667 mcg/mL
• 250 mcg dose = 250 / 1,667 = 0.15 mL (15 units)
• 500 mcg dose = 500 / 1,667 = 0.30 mL (30 units)

Example Calculations: 10 mg Vial

For a 10 mg vial (10,000 mcg):

Tip: Adding 2 mL to a 5 mg vial or 4 mL to a 10 mg vial both give you 2,500 mcg/mL — a concentration that makes the math clean and easy with standard syringes.

Reading a U-100 Insulin Syringe

Most peptide users administer doses with U-100 insulin syringes. Here is how the markings work:

• A U-100 syringe holds 1 mL total and is marked in 100 units
• Each unit = 0.01 mL
• 10 units = 0.10 mL
• 50 units = 0.50 mL
• 100 units = 1.00 mL

When you calculate that your dose is 0.10 mL, you draw to the 10-unit mark on a U-100 syringe.

For doses that fall between marks (like 7.5 units), estimate the midpoint between the 7 and 8 unit lines. If precision is critical, use a syringe with smaller gradations — a 0.3 mL or 0.5 mL insulin syringe has finer markings.

Use the Syringe Calculator to see exactly where your dose falls on different syringe sizes.

How Many Doses Per Vial?

Knowing your dose volume also tells you how many doses you will get from each vial:

Doses per vial = Total water added (mL) / Volume per dose (mL)

Example: 2 mL BAC water, 250 mcg doses (0.10 mL each):

• 2 mL / 0.10 mL = 20 doses per vial

At once-daily dosing, that is 20 days. At twice daily, 10 days.

Common Mistakes

• Confusing mg and mcg — BPC-157 vials are labeled in mg (5 mg, 10 mg), but doses are in mcg. Always convert: 5 mg = 5,000 mcg.
• Forgetting to account for the water volume — the concentration changes based on how much water you add. More water means a more dilute solution.
• Using the wrong syringe scale — always use U-100 insulin syringes. Other syringes have different unit scales.
• Not recording your reconstitution volume — write the date and water volume on the vial label so you can calculate accurately for every dose.

Quick Reference: Use the Calculator

For instant, error-free calculations, use the Reconstitution Calculator. Enter your vial size, the amount of water you added, and your desired dose — the calculator tells you exactly how many mL and syringe units to draw.

Disclaimer

This guide is for informational and educational purposes only and does not constitute medical advice. BPC-157 is a research peptide not approved by the FDA for human use. Always consult a qualified healthcare professional before starting any peptide protocol.