Free Calculator

BPC-157 Reconstitution Calculator

Turn a BPC-157 vial size, the bacteriostatic water added and an amount in mcg into the exact line on a U-100 syringe. It also shows how long the vial lasts on a once or twice daily schedule, which water amounts are easiest to measure, and how to split a BPC-157 and TB-500 blend. BPC-157 is not an approved medicine, and this page explains what that means.

5 mg vial + 2 mL 250 mcg = 10 units 2,500 mcg/mL. Each unit holds 25 mcg

10 mg vial + 2 mL 250 mcg = 5 units 5,000 mcg/mL. Each unit holds 50 mcg

Regulatory status Not approved No country has approved it as a medicine

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Maths only. No dose recommendations
Last updated: September 2026

1 The vial

BPC-157 on the vial label ?

Bacteriostatic water added

U-100 syringe size

2 Amount and schedule

Amount per injection ?

How often

1 mg = 1,000 mcg. Most BPC-157 amounts are written in mcg. A slip between the two is a thousandfold error.

The maths for this vial

Draw to U-100 syringe

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Concentration

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Each 1-unit line holds—

Full injections in vial—

Vial lasts about—

Left at 28 days—

Where the plunger’s top edge should sit —

Drawn to scale for the barrel you picked. Zero is at the needle end.

Units for other amounts in this vial

Amount	Units	Volume	On your syringe

A conversion table for this vial, not a dosing guide.

BPC-157 is not an approved medicine. These results are arithmetic only, and are only as accurate as the vial label. Products sold online are not checked for strength, purity or sterility.

1 Vial and amount

BPC-157 on the vial label

Amount per injection

mcg

U-100 syringe size

2 Your ideal line (optional)

I want each injection to land on

units

Water changes how many units an amount takes up. It never changes how much BPC-157 is in the vial.

Water amounts compared

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Water	Concentration	1 unit holds	Your amount	How easy to measure

How to Use the BPC-157 Reconstitution Calculator

Tab 1: Dose to units

Enter the BPC-157 on the vial label, in mg.
Enter the bacteriostatic water added, in mL.
Pick your U-100 syringe size. A 0.3 mL (30-unit) syringe is easiest to read for small volumes.
Enter the amount per injection in mcg or mg, and how often you inject.
Read the results. You get the unit line, a to-scale syringe picture, what each line holds, how long the vial lasts, and how much would be left at 28 days.

Tab 2: How much water?

Compares water amounts from 0.5 to 5 mL for your vial and amount. It shows which put the amount on a clean line, and works out the exact water for a unit line you choose.

Tab 3: BPC + TB-500 blend

For blended vials. Enter both amounts from the label and the water. Then either enter the units drawn to see what is in them, or enter the BPC-157 amount you need to see which line to draw to.

BPC-157 mcg to Units: The Formula

BPC-157 is usually labelled in mg but measured in mcg, so the formula converts first.

1. Concentration (mcg/mL) = vial mg × 1,000 ÷ water mL
2. Volume (mL) = amount mcg ÷ concentration
3. Units on a U-100 syringe = volume × 100

Example: 5 mg in 2 mL is 5,000 ÷ 2 = 2,500 mcg/mL. 250 mcg ÷ 2,500 = 0.1 mL, which is 10 units.

Shortcut: each unit line holds the concentration ÷ 100. At 2,500 mcg/mL each line holds 25 mcg. At 5,000 mcg/mL each line holds 50 mcg.

How Much Bacteriostatic Water for BPC-157?

There is no official figure, because there is no approved product label. The water only sets the concentration. It does not change how much BPC-157 is in the vial, or how many injections the vial holds.

5 mg vial: 2 mL gives 2,500 mcg/mL, where every 25 mcg is 1 unit. 1 mL gives 5,000 mcg/mL.
10 mg vial: 2 mL gives 5,000 mcg/mL. 4 mL gives 2,500 mcg/mL, the same as a 5 mg vial with 2 mL. Check your vial can hold 4 mL.
Rule of thumb: pick a volume that puts your amount on a whole line, ideally 5 units or more. Tab 2 finds this for you.

BPC-157 Reconstitution Chart: mcg to Units

A conversion reference for common mixes. It is not a dosing chart.

Vial + water	Concentration	1 unit holds	100 mcg	250 mcg	500 mcg
2 mg + 1 mL	2,000 mcg/mL	20 mcg	5 units	12.5 units	25 units
5 mg + 1 mL	5,000 mcg/mL	50 mcg	2 units	5 units	10 units
5 mg + 2 mL	2,500 mcg/mL	25 mcg	4 units	10 units	20 units
5 mg + 2.5 mL	2,000 mcg/mL	20 mcg	5 units	12.5 units	25 units
10 mg + 2 mL	5,000 mcg/mL	50 mcg	2 units	5 units	10 units
10 mg + 3 mL	3,333 mcg/mL	33.3 mcg	3 units	7.5 units	15 units
10 mg + 4 mL	2,500 mcg/mL	25 mcg	4 units	10 units	20 units

Values such as 12.5 or 7.5 units fall between lines on most syringes. Amounts of 2 to 4 units are hard to measure accurately. A misreading of half a line is a 12% to 25% error at that size.

BPC-157 and TB-500 Blend Calculations

Blended vials contain two peptides in one powder, often sold as 5 mg of each. After mixing, every draw holds both, in the same ratio as the label.

Each ingredient per draw = (units ÷ 100) ÷ water mL × ingredient mcg

Example: 5 mg BPC-157 plus 5 mg TB-500 in 2 mL. A 10-unit draw is 0.1 mL, which is 1/20 of the vial. It holds 250 mcg of BPC-157 and 250 mcg of TB-500.

TB-500 is not an approved medicine either, and it is also on the WADA prohibited list. A blend adds the unknowns of both products.

How Long Does Reconstituted BPC-157 Last?

No stability study of mixed BPC-157 has been published, so any “lasts 30 to 60 days” claim is a guess. A common safety limit for punctured multi-dose vials made with a preservative is 28 days. The FDA uses this figure for compounded GLP-1 vials. Keep the vial in the fridge, away from light, and do not freeze it.

Tab 1 shows how much of your vial would be left at 28 days. For example, a 10 mg vial at 250 mcg once a day holds 40 injections, but only 28 fall within the window, so 3 mg would be left over.

What Is BPC-157?

BPC-157 (“Body Protection Compound 157”) is a lab-made peptide, a chain of 15 amino acids. It is based on a sequence found in a protein in human gastric juice. It has been studied mostly in rats for tendon, muscle, gut and wound healing. Those animal results are what drive its popularity online.

Is BPC-157 Legal or FDA Approved?

Not approved anywhere. BPC-157 is not an approved medicine in the US, UK, Canada, Australia or any other country.
US compounding status is in flux. The FDA removed BPC-157 from its list of bulk substances flagged for safety risks in April 2026. In July 2026, the FDA’s Pharmacy Compounding Advisory Committee voted 8 to 6 to recommend allowing it for one use, ulcerative colitis. That vote is only advice. Any compounding pathway still needs formal FDA action and is not final.
“Research use only” does not make it legal for people. The FDA has sent warning letters to online peptide sellers, saying that such labels do not change the fact that products are sold as drugs for people.
Banned in sport. BPC-157 has been on the WADA prohibited list since 2022, under unapproved substances. Athletes cannot get an exemption for it.

What the Human Evidence on BPC-157 Actually Shows

Most calculator pages skip this part. The honest summary is short:

Almost all studies are in animals or cells. Reviews published in 2025 found the evidence base is overwhelmingly preclinical, with very few human reports.
No randomised controlled trial in people has been published for any use.
The first formal human safety data is tiny. A 2025 pilot study gave intravenous BPC-157 to two healthy adults and reported no changes in heart, liver, kidney, thyroid or blood sugar markers. Two people cannot show that something is safe.

Animal results often do not carry over to people, and no one knows the right amount for a human, or whether one exists.

BPC-157 Safety Concerns

Unknown long-term effects. There is no long-term human safety data.
Blood vessel growth. In animals, BPC-157 appears to encourage new blood vessel growth. Researchers have raised a theoretical concern that this could help existing tumours grow. It has not been tested in people. Anyone with a current or past cancer should be especially cautious.
Product quality. Unregulated vials may be under- or over-filled, contaminated, or not BPC-157 at all.
Injection risks. Poor technique or non-sterile products can cause infections and abscesses. Use a new sterile needle every time.
Pregnancy and breastfeeding. There is no safety data.

If you are considering BPC-157 for an injury or gut problem, speak to a doctor about treatments with proven evidence first. If you develop redness, swelling, fever or pain at an injection site, get medical help.

Common BPC-157 Calculation Mistakes

Mixing up mg and mcg. 250 mcg is 0.25 mg. Entering it as 250 mg is a thousandfold error.
Copying someone else’s units. “10 units” is 250 mcg in a 5 mg/2 mL vial, but 500 mcg in a 10 mg/2 mL vial.
Forgetting how much water was added. Write it on the vial straight away. The “Copy vial label” button helps.
Mixing so strong that amounts shrink to 2 or 3 units, where small misreadings are big errors.
Treating a blend as pure BPC-157. Each draw from a blend also contains the other peptide.
Using a U-40 syringe. These are for pet insulin and give 2.5 times the volume per unit. See our units to mL calculator.
Keeping a vial past 28 days.

BPC-157 Reconstitution Calculator FAQs

How many units is 250 mcg of BPC-157?

It depends on the mix. In a 5 mg vial with 2 mL of water (2,500 mcg/mL), 250 mcg is 10 units on a U-100 syringe. In a 10 mg vial with 2 mL (5,000 mcg/mL), it is 5 units.

How much bacteriostatic water do I add to a 5 mg BPC-157 vial?

There is no official amount. 2 mL is a common choice because it makes 2,500 mcg/mL, where each unit line holds 25 mcg. 1 mL makes it twice as strong. The water only changes the volume, not the amount of BPC-157.

How much bacteriostatic water for a 10 mg BPC-157 vial?

With 2 mL the mix is 5,000 mcg/mL, and each unit holds 50 mcg. With 4 mL it is 2,500 mcg/mL, which gives larger, easier-to-read volumes, if the vial can hold that much liquid.

How long does BPC-157 last after reconstitution?

No stability data for mixed BPC-157 has been published. The usual limit for a punctured multi-dose vial with a preservative is 28 days in the fridge. Treat that as a maximum.

Is BPC-157 FDA approved?

No. It is not approved as a medicine anywhere. In 2026 the FDA removed it from a list of compounding substances flagged for safety risks, and an advisory committee voted to recommend it for one use. Neither step is an approval.

Is BPC-157 banned in sport?

Yes. It has been on the World Anti-Doping Agency prohibited list since 2022, as a non-approved substance.

Does this calculator store my information?

No. Everything runs in your browser. Nothing is sent, saved or shared.

Sources and further reading

Lee E, Burgess K. Safety of intravenous infusion of BPC157 in humans: a pilot study. 2025. PubMed 40131143
Vasireddi N, Hahamyan H, Salata MJ, et al. Emerging use of BPC-157 in orthopaedic sports medicine: a systematic review. HSS Journal. 2025. PubMed 40756949
Regeneration or risk? A narrative review of BPC-157 for musculoskeletal healing. 2025. PubMed 40789979
US Anti-Doping Agency. Explanation of key changes on the 2022 WADA Prohibited List. usada.org
Holt Law. BPC-157 in 2026: why regulatory limbo is not the same as a green light. djholtlaw.com
US Food and Drug Administration. Bulk drug substances used in compounding under Section 503A. fda.gov
US Food and Drug Administration. Warning letter: Gram Peptides. March 2026. fda.gov

Reviewed and updated: September 2026. BPC-157’s regulatory status is changing. We update this page when the FDA acts.