How to Use This Calculator
Enter the milligrams of BPC-157 in the vial, then the bacteriostatic water added in mL. Enter the amount to draw in mcg and pick the syringe size, then click Calculate. The result shows the concentration, the draw in mL and units, and how many doses of that size the vial holds.
One Vial, One Peptide
This calculator is for a plain BPC-157 vial that holds only BPC-157. If your vial is a blend, for example BPC-157 with TB-500 or a KLOW mix, the draw has to be sized by the combined concentration instead, so use the BPC-157 and TB-500 Blend Calculator or the KLOW Blend Calculator for those.
Where This Fits Alongside Other Research Tools
The Peptide Reconstitution Calculator works out how much bacteriostatic water to add to reach a target concentration before you draw. The Peptide Dosage Calculator does the same mcg to units conversion for any single peptide at a known concentration. This page is the BPC-157 version of that conversion, with the wording set for a single BPC-157 vial.
BPC-157 5 mg and 10 mg Vials: Draw Volume at Different Water Volumes
The table shows the math for a 5 mg BPC-157 vial. The units column uses a 250 mcg draw only as a worked example. Change the numbers in the calculator above to match your own vial and draw.
| Bac water added | Concentration | mcg per mL | Units for 250 mcg |
|---|---|---|---|
| 1 mL | 5 mg/mL | 5,000 mcg | 5 units |
| 2 mL | 2.5 mg/mL | 2,500 mcg | 10 units |
| 3 mL | 1.67 mg/mL | 1,667 mcg | 15 units |
For a 10 mg vial the concentration doubles at the same water volume. For example, 10 mg in 2 mL is 5 mg per mL (5,000 mcg per mL), so a 250 mcg draw is 0.05 mL, or 5 units. The number of doses depends only on the vial size and the draw size: 5,000 / 250 = 20 doses from a 5 mg vial and 10,000 / 250 = 40 doses from a 10 mg vial. To convert a draw on its own, use the mg to units syringe calculator.
Who Should Use This
Researchers working with a single BPC-157 vial who need the syringe draw for a given amount and the number of doses the vial holds.
What This Calculator Does
The BPC-157 Calculator turns the milligrams of BPC-157 in a vial, the bacteriostatic water added and an amount in mcg into the concentration, the draw in mL and units on a U-100 syringe, and the number of doses the vial holds.
Formula Used
Concentration (mg/mL) = BPC-157 (mg) / BAC water (mL)Draw (mL) = Amount (mg) / ConcentrationUnits to draw = Draw (mL) x 100 (U-100 syringe)Doses per vial = FLOOR(BPC-157 (mg) / Amount (mg))Example Calculation
Limitations
This is a unit-conversion tool, not guidance on what to use. It assumes the vial dissolves evenly and that the vial size on the label is accurate, and it ignores dead space and draw loss. Very small draws are hard to measure on a 1 mL syringe, so a smaller syringe or a larger water volume may be needed. Confirm the vial contents against the supplier label before entering them.
Frequently Asked Questions
How many units is 250 mcg of BPC-157?
It depends on the concentration. In a 10 mg vial reconstituted with 2 mL of bacteriostatic water the concentration is 5.00 mg/mL, so 250 mcg is 0.050 mL, which is 5.0 units on a U-100 syringe. Change the vial size or the water volume and the units change with it.
How do I work out the concentration of a BPC-157 vial?
Divide the milligrams of BPC-157 in the vial by the millilitres of bacteriostatic water you added. A 10 mg vial with 2 mL of water is 5.00 mg/mL. A 5 mg vial with the same 2 mL is 2.50 mg/mL.
Can I use this for a BPC-157 and TB-500 blend?
No. A blend vial holds two peptides in one liquid, so the draw is sized by the combined concentration and the per-peptide amounts differ. Use the BPC-157 and TB-500 Blend Calculator for that vial.
Why is my draw less than one unit?
A concentrated vial can put a small amount below the smallest marking on a 1 mL syringe. Adding more bacteriostatic water lowers the concentration and makes the draw larger and easier to read, and the Peptide Reconstitution Volume Optimizer shows which water volume puts the draw on a clear marking.
How much bac water do I add to a 5 mg BPC-157 vial?
The water volume only sets the concentration, so the calculator works with any amount. For a 5 mg vial, 1 mL gives 5 mg per mL, 2 mL gives 2.5 mg per mL and 3 mL gives 1.67 mg per mL. Divide the mcg you want to draw by the mcg per mL to get mL, then multiply by 100 for units. Enter your own water volume in the calculator to see the draw.
How much bac water do I add to a 10 mg BPC-157 vial?
The same math applies: the water volume only sets the concentration. For a 10 mg vial, 2 mL gives 5 mg per mL (5,000 mcg per mL) and 4 mL gives 2.5 mg per mL (2,500 mcg per mL). A 250 mcg draw is then 0.05 mL (5 units) at 2 mL or 0.1 mL (10 units) at 4 mL. The vial holds 10,000 / 250 = 40 such draws either way. This is arithmetic only, not a recommended amount.