How many units is 250 mcg of BPC-157?

It depends entirely on how much water you added. In a 5 mg vial reconstituted with 2 mL, the concentration is 2.5 mg/mL, so 250 mcg is 0.1 mL, which is 10 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 5 units, and with 3 mL it is 15 units.

How much bacteriostatic water for a 5 mg BPC-157 vial?

2 mL is the usual choice. It gives 2.5 mg/mL, which puts the commonly reported range of 100 mcg to 1000 mcg between roughly 4 and 40 units. Aim for a draw between about 10 and 50 units, where the barrel is easiest to read, and add or remove water to get there.

How many doses are in a 5 mg vial?

Divide 5 by your dose. At 250 mcg that is 20 doses, which at once daily is 20 days.

How many mcg are in a 5 mg vial?

5000 mcg. 1 mg is 1000 mcg. At 250 mcg per day a 5 mg vial is 20 doses.

Is BPC-157 approved for human use?

No. It is not an approved medicine in any major market and is sold for research use only.

BPC-157 dosage calculator

In a 5 mg vial with 2 mL of water (2.5 mg/mL), 250 mcg of BPC-157 is 10 units on a U-100 insulin syringe. BPC-157 is dosed in micrograms out of a vial labelled in milligrams, which is where most of the confusion comes from. 1 mg is 1000 mcg.

Reviewed 3 September 2026
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25 printable pages: dosing cards for the twelve most-used compounds at three water volumes, titration planners, a vial log, and five pages on what to do when it has already gone wrong.

Dose to units at the usual vial and water

Dose	U-100 units	Draw	Doses per vial	Vial lasts
100 mcg	4 units	0.04 mL	50	50 days
200 mcg	8 units	0.08 mL	25	25 days
250 mcg	10 units	0.1 mL	20	20 days
300 mcg	12 units	0.12 mL	16	16 days
400 mcg	16 units	0.16 mL	12	12 days
500 mcg	20 units	0.2 mL	10	10 days
750 mcg	30 units	0.3 mL	6	6 days
1000 mcg	40 units	0.4 mL	5	5 days

5 mg vial in 2 mL of bacteriostatic water (2.5 mg/mL), U-100 insulin syringe, once daily.

About BPC-157

BPC-157 is a synthetic pentadecapeptide. It is not approved for human use in any major market and is sold for laboratory research. Commonly reported protocols sit at 250 to 500 mcg per day, sometimes split into two doses, but that is a description of what people report rather than a recommendation.

The mg to mcg conversion is where errors happen. A 5 mg vial contains 5000 mcg. Reconstituted with 2 mL, that is 2500 mcg/mL, so a 250 mcg dose is 0.1 mL, or 10 units. Reading the vial as 5 mcg instead of 5 mg would be a thousand-fold error.

Using a BPC-157 and TB-500 blend vial instead of a single peptide? The BPC-157 TB-500 blend dosage calculator works from the 10 or 20 mg total on the label and shows how much of each peptide is in every draw.

The same 5 mg vial at other water volumes

If the draw is awkward to read, change the water, not the dose. The dose stays the same; only the mark moves.

Vial	BAC water	Concentration	Draw	U-100 units	Doses/vial
5 mg	1 mL	5 mg/mL	0.05 mL	5 units	20
5 mg	2 mL	2.5 mg/mL	0.1 mL	10 units	20
5 mg	3 mL	1.67 mg/mL	0.15 mL	15 units	20
10 mg	1 mL	10 mg/mL	0.025 mL	2.5 units	40
10 mg	2 mL	5 mg/mL	0.05 mL	5 units	40
10 mg	3 mL	3.33 mg/mL	0.075 mL	7.5 units	40

All rows above assume a 250 mcg dose and a standard U-100 insulin syringe, where 100 units = 1 mL.

How long it lasts in the body

Not well characterised in humans. Animal data suggests it clears quickly. A decay curve is only drawn where a human half-life is documented, so there is none here. Treat any precise figure for BPC-157 elsewhere with caution.

Common questions

How many units is 250 mcg of BPC-157?: It depends entirely on how much water you added. In a 5 mg vial reconstituted with 2 mL, the concentration is 2.5 mg/mL, so 250 mcg is 0.1 mL, which is 10 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 5 units, and with 3 mL it is 15 units.
How much bacteriostatic water for a 5 mg BPC-157 vial?: 2 mL is the usual choice. It gives 2.5 mg/mL, which puts the commonly reported range of 100 mcg to 1000 mcg between roughly 4 and 40 units. Aim for a draw between about 10 and 50 units, where the barrel is easiest to read, and add or remove water to get there.
How many doses are in a 5 mg vial?: Divide 5 by your dose. At 250 mcg that is 20 doses, which at once daily is 20 days.
How many mcg are in a 5 mg vial?: 5000 mcg. 1 mg is 1000 mcg. At 250 mcg per day a 5 mg vial is 20 doses.
Is BPC-157 approved for human use?: No. It is not an approved medicine in any major market and is sold for research use only.

IndependentThis site does not sell peptides and is not owned by a vendor.

The maths is openThe formula is on every page and in the methodology. The code is one file with an automated test suite, run before each deploy.

How it is fundedNo ads and no vendor links here. It is published by the team behind Peptide Bureau, which earns from affiliate links on its own site, and VialHaus, the same team's vial storage shop, which the storage notes link to.

ReviewedDose ranges and half-lives checked 3 September 2026.

Buying BPC-157?

Peptulator does not list, rank or link vendors. Whoever the supplier is, use the strength printed on your own vial and check the batch certificate of analysis before you rely on any number here.

The BPC-157 guideDosing, evidence and side effects, at Peptide Bureau Read a syringeU-100 vs U-40, and the 2.5x error Build a full protocolThe stack builder at Peptide Bureau, about two minutes

Common conversions

The same three-step maths, pre-filled for the doses people ask about most. Units on a U-100 insulin syringe, where 100 units is 1 mL.

mg to units calculator Any dose at any concentration, both directions, with the full reference tables
Units to mg calculator What the units you drew are in milligrams
1 mg to units The most-asked conversion, at every common setup

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Every one of the 27 compound calculators, charts and tools: the full list.

Before you use these numbers This is a unit-conversion tool. It turns a vial strength and a water volume into a concentration, a draw volume and a syringe mark. It does not tell you what to take, whether to take it, or whether a compound is safe for you. Most compounds listed are sold for laboratory research and are not approved for human use. Nothing here is medical advice. Dosing decisions belong with a licensed clinician who knows your history. Always check the strength printed on your own vial rather than trusting a preset.