Pick the vial, the water you added and the dose. Get the exact draw in units for the syringe in your hand.
Draw to5.0units0.05 mL
Step 1 of 4
1How many mg are in your vial?
Vial strengthamount printed on the vial
2How many mL of water did you add?
Bacteriostatic water addedhow much water you added
3What dose do you want to convert?
Target doseenter the dose you want to convert
This vial holds 10,000 mcg in total.
4Which syringe are you using?
Syringe typematch the label on your syringe
U-100 insulin syringe · 1 mL · lines every 2 units · 1 unit = 0.01 mL
Draw to
5.0units
0.05 mL · 5.00 mg/mL · 50 mcg per unit · 40 doses per vial
5.0 units on a U-100 insulin syringe · 1 mL · lines every 2 units, which is 0.05 milliliters. The nearest syringe line is 6 units.
This falls between two syringe lines. The nearest line on this U-100 syringe is 6 units. Open the syringe details below to see the difference.
10 mg ÷ 2 mL = 5.00 mg/mL → 50 mcg/unit · 250 mcg = 0.050 mL =5.0 units
Your address is used to send this one card. The email also includes an optional link for updates when our data changes. Nothing else is sent unless you choose that link, and you can unsubscribe anytime.
Show the math and syringe details+
Can this syringe show the result clearly?
This draw falls between syringe lines. The exact volume is 5.00 units, but a U-100 syringe has a line every 2 units. Using the nearest line gives 6 units — a 20.0% difference, or 50 mcg.
Want an easier syringe number?
2.5 mL of water instead4.00 mg/mL · 40 mcg/unit6.3 u4.0% off
1.5 mL of water instead6.67 mg/mL · 67 mcg/unit3.8 u6.7% off
Adding more water makes the mixture less concentrated, so the same dose uses more syringe units. It does not change how much peptide is in the vial.
This setup is in the address bar — every input is part of the link.
Educational math, not medical advice — dosing decisions belong to a licensed clinician. The tabs above also plan a schedule week by week and count how many doses one vial holds.
How to use the calculator
STEP 1
Enter the amount in the vial
Use the total amount printed on the vial, in mg.
STEP 2
Enter the water you added
Use the amount of water added to that vial, in mL.
STEP 3
Enter the dose you want to convert
Choose mg or mcg, then match the result to your syringe.
BPC-157 is a lab-made peptide, fifteen amino acids long, copied from one short stretch of a protein found in human stomach juice. People take it hoping to heal faster — tendon and ligament injuries, muscle tears, and gut conditions such as inflammatory bowel disease.
Nearly all of that comes from rats and mice. Three small reports describe people receiving it, none with a comparison group, and between them they cover fewer than 30 subjects. None of the three tested a healing injury, and none used an injection under the skin.
No completed controlled human trial has shown which dose works for BPC-157. The range people report using is not a study result, tested schedule or recommendation.
no human dose shown to work
The calculator converts the dose you enter into mL and syringe units. It does not show that any dose of BPC-157 is safe or works.
Examples using a 10 mg BPC-157 vial
Each row starts with the same 10 mg vial and changes only the amount of water. More water makes the mixture less concentrated, so the same dose uses more syringe units.
◆ How the water amount changes the resultdose used: 250 mcg
For a 10 milligram vial: bacteriostatic water added, resulting concentration, micrograms per U-100 unit, and the draw for a 250 mcg dose.
Water added
Concentration
Per U-100 unit
Draw for 250 mcg
Nearest syringe line
1 mL
10.00 mg/mL
100.0 mcg
2.5 u · 0.025 mL
2 u · 20.0% off
2 mL
5.00 mg/mL
50.0 mcg
5.0 u · 0.050 mL
6 u · 20.0% off
3 mL
3.33 mg/mL
33.3 mcg
7.5 u · 0.075 mL
8 u · 6.7% off
The vial, water and dose shown here are the calculator’s starting example for BPC-157. Replace them with your own values. Every result in the table is calculated from those inputs.
Drawn from once a week at 250 mcg, a 10 mg vial yields 40 doses — about 40.0 weeks of supply. No cited source says how long the mixed vial keeps, so no storage window is shown.
Exact arithmetic, applied to an amount nobody has established
The math on this page is deterministic and it is right. What it is applied to is a convention that circulates online, because no study in people has established a dose for BPC-157.
3Open the mixing details — 3 notes
Every published human quantity used another route
The page is blunt about this. The amounts anyone has given a person in print went into a vein, or into the wall of a bladder during a procedure. None went under the skin, which is the one thing these vials are sold for.
No injected amount has been established, so there is no evidence-based dose to convert into syringe units.
The circulating draw sits at the bottom of the barrel
In mass terms the conventional BPC-157 amount is small. On the larger vial with the least water it lands within the first few syringe lines. One mark is then a large share of the whole draw.
Adding more water spreads the same amount across more syringe marks. The dose does not change; the draw becomes easier to read.
The mistake: reading a tidy number as a settled one
Enter anything and the calculator returns a clean figure in units. Clean figures feel confirmed. Here, a clean figure means only that the division came out even.
The site keeps the tool working for this compound because people will do the arithmetic either way. Doing it wrong on a barrel scale is its own harm. That is not the same as the arithmetic vouching for the number you typed.
Where the BPC-157 number came from, and who worked it out
No trial has established an amount for this peptide. A peer-reviewed paper reports an amount used off label and explains how it was chosen, but that is not the same as a tested dose.
4Read the supporting evidence — 4 supporting notes
Two reviews, two different spans, and one figure offered for two routes
The review cited here prints the daily amount people use. In the same sentence it says how that was reached. Somebody scaled it from a rodent range by eye. No formal scaling method was applied, and nothing was checked in a person.
Clearance is measured in minutes; the claims run in days
The page notes that measured clearance is quick. It is gone in well under half an hour. The effects people attach to this peptide are described in hours and in days. Nobody has explained the distance between those statements.
No pharmacy is allowed to fill these vials
This substance is not approved, and it is not legal to compound for people. There is no pharmacy strength to copy and no official volume to mix to. Two parties asked for a compounding route and both withdrew their request.
The amount circulates as a daily habit; nothing published was given daily
Look at what people have received in print and the shape is wrong for a schedule. A single procedure at the bladder wall. One infusion lasting an hour. An injection into a knee. Each is an event rather than a routine.
Units to dose at 5.00 mg/mL
Mix 10 mg into 2 mL and one U-100 unit carries 50.0 mcg. The table shows how much peptide is in each numbered syringe line. These are conversion examples, not suggested doses.
10Open the unit conversion table — 10 rows
Numbered U-100 syringe lines converted to volume and mass at 5.00 milligrams per milliliter.
U-100 line
Volume
Mass (mcg)
Mass (mg)
10 u
0.10 mL
500 mcg
0.5 mg
20 u
0.20 mL
1,000 mcg
1 mg
30 u
0.30 mL
1,500 mcg
1.5 mg
40 u
0.40 mL
2,000 mcg
2 mg
50 u
0.50 mL
2,500 mcg
2.5 mg
60 u
0.60 mL
3,000 mcg
3 mg
70 u
0.70 mL
3,500 mcg
3.5 mg
80 u
0.80 mL
4,000 mcg
4 mg
90 u
0.90 mL
4,500 mcg
4.5 mg
100 u
1.00 mL
5,000 mcg
5 mg
How the math works
Concentration — divide the amount in the vial by the water you added: mg ÷ mL = mg/mL. This tells you how many mg are in each mL.
Volume — the dose divided by that concentration: dose ÷ (mg/mL) = mL.
Units — on a U-100 syringe one unit is 0.01 mL, so mL × 100 = units. A U-40 unit is 0.025 mL, so the wrong barrel is a 2.5× error. That is why the calculator asks which one you have.
Rounding gap — the exact draw against the nearest syringe line: |exact − nearest line| ÷ exact × 100 = % difference.
Medically reviewed by Jennifer Montecillo, MD · non-practicing medical reviewer·Reviewed 2026-08-13·open the primary sources
Useful guides for this calculation
The math is only one part of the question. These guides cover the compound, published doses, side effects, mixing steps and supplies.
The calculator offers 1, 2 and 3 mL for 5 mg and 10 mg vials. Those choices create six concentrations from 1.67 to 10 mg/mL; the amount in the vial does not change.
The 250 micrograms the tool opens on covers 2.5 units in the strongest of those and 15 units in the weakest. Six times the barrel length, identical powder, identical injection.
How much water to reconstitute 10 mg of BPC-157?
1 mL makes 10 mg/mL, 2 mL makes 5 mg/mL and 3 mL makes 3.33 mg/mL. All three sit on this page, and against 250 micrograms they read 2.5, 5 and 7.5 units.
Two and a half units is the awkward one. A barrel cannot be read finer than its marks, and one mark shifts that draw by two fifths. The 3 mL choice triples the reading and costs nothing.
How to reconstitute 5ml of BPC-157?
5 mL is a water volume rather than a vial, and it is larger than any preset here. A U-100 barrel holds 1 mL, so getting 5 mL into the glass means five full barrels of water.
The arithmetic still holds. 10 mg spread through 5 mL is 2 mg/mL, and 250 micrograms then draws 12.5 units. That is a longer reading than any listed volume gives, in a vial holding five times the liquid.
How to determine how much BPC-157 to take?
No human trial has established a BPC-157 dose, so the calculator does not provide a recommended amount.
A 2026 review prints what circulates: 200 to 500 micrograms a day. The same sentence says where it came from — somebody worked it out informally from a rodent range, with nothing measured in a person. A second 2026 review puts the same practice at 200 to 1000.
1primary source, each with the day we read it — open the documents used on this page