BPC-157 Dosage Chart: Vial Size to Syringe Units

A BPC-157 dosage chart maps a vial's labeled mg amount and the bacteriostatic water added to it into the number that actually matters at injection time: syringe units. BPC-157 ships as lyophilized powder, so the mg amount on the label is fixed, but concentration is not — it depends on how much water goes into the vial, and research doses for BPC-157 are typically described in micrograms, not milligrams (1 mg = 1,000 mcg). This chart shows that math for the two most common BPC-157 reference setups. It is a reference for research and educational purposes only and is not medical advice.

Two reference concentrations

There is no single required water volume for BPC-157. The two setups below are common because researchers frequently reference 5 mg and 10 mg vials, each mixed with the same 2 mL of bacteriostatic water:

Vial size	Water added	Concentration
5 mg (5,000 mcg)	2 mL	2,500 mcg/mL
10 mg (10,000 mcg)	2 mL	5,000 mcg/mL

Both come from the same formula — concentration equals vial mass divided by water volume — applied to two common BPC-157 vial sizes at the same water volume. Neither concentration is more correct than the other; a 10 mg vial simply packs twice the BPC-157 into the same 2 mL, which doubles the concentration. For the full mixing procedure, see the BPC-157 dosage calculator guide.

BPC-157 dosage chart by target dose

Each row below shows a target dose converted to draw volume and units on a U-100 insulin syringe (100 units per mL) at both reference concentrations:

Target dose	mL at 2,500 mcg/mL	Units at 2,500 mcg/mL	mL at 5,000 mcg/mL	Units at 5,000 mcg/mL
150 mcg	0.06 mL	6 units	0.03 mL	3 units
200 mcg	0.08 mL	8 units	0.04 mL	4 units
250 mcg	0.1 mL	10 units	0.05 mL	5 units
300 mcg	0.12 mL	12 units	0.06 mL	6 units
400 mcg	0.16 mL	16 units	0.08 mL	8 units
500 mcg	0.2 mL	20 units	0.1 mL	10 units
600 mcg	0.24 mL	24 units	0.12 mL	12 units

Every row above lands on a whole unit at both concentrations, because 2,500 and 5,000 both divide evenly into these particular dose sizes. That isn't guaranteed for every dose — a target that doesn't share a clean divisor with the concentration lands on a fractional unit instead, which the section below works through.

Reading the chart against a specific vial

Worked example. Take a 5 mg vial mixed with 2 mL of bacteriostatic water. Concentration is 5,000 ÷ 2 = 2,500 mcg/mL. For a 300 mcg target dose: 300 ÷ 2,500 = 0.12 mL. Converted to units on a U-100 syringe, 0.12 mL × 100 = 12 units.

Compare that to the same 300 mcg dose from a 10 mg vial mixed with 2 mL of water, at 5,000 mcg/mL: 300 ÷ 5,000 = 0.06 mL, or 6 units. The dose in mcg is identical in both cases. The unit count differs only because the two vials were reconstituted to different concentrations — which is exactly what this BPC-157 dosage chart is showing at every row.

Vial size sets dose count, water volume sets draw size

Vial size and water volume do different jobs, and conflating them is the most common misread of a chart like this one. Vial size sets the total mcg of BPC-157 available across the whole vial. Water volume sets concentration, which is what determines the units for any single draw.

At a 250 mcg dose, a 5 mg (5,000 mcg) vial provides 5,000 ÷ 250 = 20 doses. A 10 mg (10,000 mcg) vial at the same 250 mcg dose provides 10,000 ÷ 250 = 40 doses — twice the doses, because it holds twice the BPC-157, not because it was mixed differently. Water volume, by contrast, changes only the draw size per dose, not how many doses the vial holds.

When your vial doesn't match either setup

A vial mixed with a different water volume still follows the same formula — it just won't land on either column in the chart above. A 5 mg vial mixed with 2.5 mL of water, for example, gives 5,000 ÷ 2.5 = 2,000 mcg/mL, or 20 mcg per unit. A 250 mcg dose at that concentration is 250 ÷ 2,000 = 0.125 mL, or 12.5 units — a half-unit reading that only works cleanly on a syringe marked in half-unit increments. On a standard whole-unit barrel, that's a signal to change the water volume rather than round the draw up or down.

This is the case the free peptide calculator is built for: enter the vial size and water volume you actually used, rather than searching a chart for a close match. It runs the same concentration-to-units math for any combination, not just the two shown here.

Common mistakes

• Reading a unit count from this chart against the wrong vial. A number in the 2,500 mcg/mL columns only applies if your vial was actually mixed to that concentration. Confirm which water volume you used before drawing.
• Assuming vial size sets the dose. It sets the total mcg available across the vial. Concentration — set by water volume — is what determines units per dose.
• Mixing up mg and mcg. BPC-157 vials are labeled in milligrams, but research doses are usually described in micrograms (1 mg = 1,000 mcg). Confirm the unit before doing any conversion.
• Rounding mid-calculation. Carry the full decimal through the mL step and only round the final unit reading, and only if the syringe requires it.

Use the calculator

This chart covers two common BPC-157 concentrations, but your vial and target dose may not match either row exactly. Enter your vial size, water volume, and target dose into the peptide reconstitution calculator for an exact unit count, or run its reverse mode to find the water volume that lands a given dose on a whole unit mark. For the units-per-mL relationship in more depth, see the BPC-157 units per mL calculator guide.