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
27 compounds
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Free downloadThe Protocol Pack

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.

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
2 mg to units Retatrutide starting dose
2.5 mg to units Tirzepatide starting dose
5 mg to units Tirzepatide step two, MOTS-c, epitalon
10 mg to units Tirzepatide step four
12 mg to units Retatrutide top dose, tirzepatide 12.5 mg
15 mg to units Tirzepatide top dose

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Growth hormone axis

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MOTS-c calculator 5 to 10 mg, two or three times a week

Repair, skin and blends

BPC-157 calculator (this page)
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GHK-Cu calculator 50 to 200 mg vials, mg doses
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Dosage charts and schedules

Peptide reconstitution chart Concentration for every vial and water combination
Peptide dosing chart Printable unit tables for every compound
Retatrutide titration schedule 2 to 12 mg in units, stage by stage
Tirzepatide titration schedule 2.5 to 15 mg in units, stage by stage
Semaglutide titration schedule 0.25 to 2.4 mg in units, stage by stage
KLOW dosage and frequency chart The 80 mg blend at 2, 3 and 4 mL, both phases
GLOW dosage chart The 70 mg blend, units to each peptide
Wolverine stack dosing chart BPC-157 + TB-500, blend and separate vials
MOTS-c dosage chart 5 and 10 mg vials at three water volumes
Tirzepatide reconstitution chart Every vial size, every water volume, the whole ladder
Retatrutide dosing chart 1 to 12 mg across 10, 20 and 30 mg vials
Tirzepatide units to mg chart Both directions, every vial and water volume
Semaglutide units to mg chart The dosage chart in units, both directions
NAD+ injection dosage chart Per day, per week and frequency, 100 to 1,000 mg vials
Tesamorelin dosage chart 2, 5 and 10 mg vials, 0.5 to 2 mg in units
BPC-157 dosage chart mcg doses from 5 and 10 mg vials, four water volumes
PT-141 dosage chart The 10 mg vial, 0.5 to 2 mg, with uses per vial
Sermorelin dosage chart Nightly mcg doses from 5, 10 and 15 mg vials
Printable dosing charts Four one-page charts to save, pin or print
Peptide storage chart How long powder and mixed vials last, fridge to freezer

Tools

Peptide calculator The general tool, any compound
Reconstitution calculator How much water to add, and why it matters
Bacteriostatic water calculator Pick a volume that lands where you can read it
How to read an insulin syringe U-100 vs U-40, and the 2.5x error
The Protocol Pack Free 25-page printable reference
mg to units calculator Both directions, any concentration, with the reference tables
1 mg to units on an insulin syringe The conversion table for every common concentration
Units to mg calculator The mark you drew, back into milligrams
2 mg to units on an insulin syringe 2 mg at every common vial and water volume
2.5 mg to units on an insulin syringe 2.5 mg at every common vial and water volume
5 mg to units on an insulin syringe 5 mg at every common vial and water volume
10 mg to units on an insulin syringe 10 mg at every common vial and water volume
12 mg to units on an insulin syringe 12 mg at every common vial and water volume
15 mg to units on an insulin syringe 15 mg at every common vial and water volume
Methodology Every formula, assumption and rounding rule
About Peptulator Who publishes it, independence and contact
Embed the calculator One line of HTML, free, credit line only

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.