How many units is 1 mg of BPC-157 / TB-500 blend?

It depends entirely on how much water you added. In a 20 mg vial reconstituted with 2 mL, the concentration is 10 mg/mL, so 1 mg 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 20 mg BPC-157 / TB-500 blend vial?

2 mL is the usual choice. It gives 10 mg/mL, which puts the commonly reported range of 0.25 mg to 2 mg between roughly 2.5 and 20 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 20 mg vial?

Divide 20 by your dose. At 1 mg that is 20 doses, which at once daily is 20 days.

How many units is 1 mg of the BPC-157 TB-500 blend?

In a 20 mg blend vial with 2 mL of water, 10 units on a U-100 syringe. That draw holds 500 mcg of BPC-157 and 500 mcg of TB-500.

Should I use the blend or two separate vials?

Separate vials let you dose each peptide on its own schedule, which matches how they are usually reported. The blend is simpler and cheaper but locks the ratio. The calculator handles either; run it once per vial if you keep them separate.

BPC-157 / TB-500 blend dosage calculator

The BPC-157 and TB-500 blend, sold as the Wolverine stack, is usually 10 mg of each in one 20 mg vial. Enter the total on the label and your total dose; the page splits it back into each peptide.

Peptulator, peptulator.com. Research use only, not medical advice.

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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
0.25 mg	2.5 units	0.025 mL	80	80 days
0.5 mg	5 units	0.05 mL	40	40 days
1 mg	10 units	0.1 mL	20	20 days
1.5 mg	15 units	0.15 mL	13	13 days
2 mg	20 units	0.2 mL	10	10 days

20 mg vial in 2 mL of bacteriostatic water (10 mg/mL), U-100 insulin syringe, once daily.

About BPC-157 / TB-500 blend

The Wolverine stack is BPC-157 and TB-500 together, either from two vials or from a single pre-mixed blend vial. The blend is normally a 1:1 ratio, 10 mg of each for a 20 mg vial. Neither peptide is an approved medicine and both are sold for research use.

The ratio is the catch. On their own, BPC-157 is commonly reported at 250 to 500 mcg daily and TB-500 at 2 to 2.5 mg twice weekly, which is not a 1:1 ratio at all. In a blend you dose both at the same time in the vial's fixed proportions, so people typically report 0.5 to 1 mg of total blend per day, which delivers 250 to 500 mcg of each. A 20 mg vial with 2 mL of water is 10 mg/mL, so 1 mg of blend is 0.1 mL, or 10 units. The Wolverine dosing chart page lays out every combination.

What is in each draw

The vial is 10 mg BPC-157 + 10 mg TB-500, a fixed 1:1 ratio. Every draw contains all of them in that proportion. Split below for 20 mg in 2 mL (10 mg/mL). The per-component figures are inferred from the label ratio, not measured.

Draw	Total blend	BPC-157	TB-500
5 units	0.5 mg	0.25 mg	0.25 mg
10 units	1 mg	0.5 mg	0.5 mg
15 units	1.5 mg	0.75 mg	0.75 mg
20 units	2 mg	1 mg	1 mg
25 units	2.5 mg	1.25 mg	1.25 mg
30 units	3 mg	1.5 mg	1.5 mg

The same 20 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
20 mg	1 mL	20 mg/mL	0.05 mL	5 units	20
20 mg	2 mL	10 mg/mL	0.1 mL	10 units	20
20 mg	3 mL	6.67 mg/mL	0.15 mL	15 units	20
10 mg	1 mL	10 mg/mL	0.1 mL	10 units	10
10 mg	2 mL	5 mg/mL	0.2 mL	20 units	10
10 mg	3 mL	3.33 mg/mL	0.3 mL	30 units	10

All rows above assume a 1 mg 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. 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 / TB-500 blend elsewhere with caution.

Common questions

How many units is 1 mg of BPC-157 / TB-500 blend?: It depends entirely on how much water you added. In a 20 mg vial reconstituted with 2 mL, the concentration is 10 mg/mL, so 1 mg 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 20 mg BPC-157 / TB-500 blend vial?: 2 mL is the usual choice. It gives 10 mg/mL, which puts the commonly reported range of 0.25 mg to 2 mg between roughly 2.5 and 20 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 20 mg vial?: Divide 20 by your dose. At 1 mg that is 20 doses, which at once daily is 20 days.
How many units is 1 mg of the BPC-157 TB-500 blend?: In a 20 mg blend vial with 2 mL of water, 10 units on a U-100 syringe. That draw holds 500 mcg of BPC-157 and 500 mcg of TB-500.
Should I use the blend or two separate vials?: Separate vials let you dose each peptide on its own schedule, which matches how they are usually reported. The blend is simpler and cheaper but locks the ratio. The calculator handles either; run it once per vial if you keep them separate.

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 earnsAffiliate links on one marked page, never inside the calculator.

ReviewedDose ranges and half-lives checked 3 September 2026.

Buying BPC-157 / TB-500 blend?

The where to buy page lists the vendors this site uses and what to check first. Peptide Bureau keeps the ranked scorecard.

Where to buyWhat to check before you order Vendor scorecardRanked vendors, at Peptide Bureau Build a full protocolThe stack builder at Peptide Bureau, about two minutes

All calculators and charts

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Tirzepatide calculator The 2.5 to 15 mg ladder, converted
Semaglutide calculator The 0.25 to 2.4 mg ladder, converted
Cagrilintide calculator Amylin analogue, 0.3 to 4.5 mg weekly

Growth hormone axis

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CJC-1295 / Ipamorelin blend calculator The 5 mg + 5 mg blend, per component
Sermorelin calculator Nightly mcg doses to units
Tesamorelin calculator 1 to 2 mg daily, in units
Hexarelin calculator mcg doses to units
IGF-1 LR3 calculator Tens of mcg from very small vials
AOD-9604 calculator 300 mcg daily, in units
MOTS-c calculator 5 to 10 mg, two or three times a week

Repair, skin and blends

BPC-157 calculator mcg doses from a 5 or 10 mg vial
TB-500 calculator Loading and maintenance, in units
BPC-157 / TB-500 blend calculator (this page)
GHK-Cu calculator 50 to 200 mg vials, mg doses
GLOW blend calculator The 70 mg blend, split per component
KLOW blend calculator The 80 mg blend, split per component

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PT-141 calculator 0.5 to 2 mg, as needed
Melanotan II calculator mcg loading doses to units
NAD+ calculator 100 to 1,000 mg vials, 25 to 200 mg doses
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Kisspeptin-10 calculator mcg doses to units
Glutathione calculator Hundreds of mg, or a 200 mg/mL solution

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
Printable dosing charts Four one-page charts to save, pin or print

Tools

Peptide calculator The general tool, any compound
Reconstitution calculator How much water to add, and why it matters
mg to units calculator Both directions, any concentration
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
Where to buy Vendor notes and what to check first
1 mg to units on an insulin syringe The conversion table for every common concentration

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.