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.

IndependentThis site does not sell peptides and is not owned by a vendor. Every other calculator on page one of Google belongs to a shop.

The maths is openThe formula is written out on this page and the code behind it is a single file with an automated test suite.

How it earnsAffiliate links on one clearly marked page, and nowhere else. Never inside the calculator.

ReviewedDose ranges and half-life figures last checked 3 September 2026.

Dose to units, at the standard setup

Dose	Draw	U-100 units	Doses per vial	Vial lasts
0.25 mg	0.025 mL	2.5 units	80	80 days
0.5 mg	0.05 mL	5 units	40	40 days
1 mg	0.1 mL	10 units	20	20 days
1.5 mg	0.15 mL	15 units	13	13 days
2 mg	0.2 mL	20 units	10	10 days

Based on a 20 mg vial reconstituted with 2 mL of bacteriostatic water, which is 10 mg/mL, drawn on a standard U-100 insulin syringe, once daily.

About the numbers above

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

A 20 mg vial at different water volumes

If the draw feels awkward to read, change the water rather than 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 stays in you

Not well characterised in humans. This site only draws a decay curve where a half-life is actually documented in humans, so there is none here. Treat any precise figure you see elsewhere for BPC-157 / TB-500 blend with suspicion.

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.

Buying BPC-157 / TB-500 blend? The where to buy page lists the vendors this site uses and what to check before ordering, and Peptide Bureau keeps the ranked vendor scorecard.

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Tools

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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

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