How many units is 100 mcg of Hexarelin?

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 100 mcg is 0.04 mL, which is 4 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 2 units, and with 3 mL it is 6 units.

How much bacteriostatic water for a 5 mg Hexarelin vial?

2 mL is the usual choice. It gives 2.5 mg/mL, which puts the commonly reported range of 50 mcg to 300 mcg between roughly 2 and 12 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 100 mcg that is 50 doses, which at once daily is 50 days.

How many units is 100 mcg of hexarelin?

In a 5 mg vial with 2 mL of water, 4 units on a U-100 syringe. With 5 mL of water, 10 units.

Hexarelin dosage calculator

Hexarelin is dosed in micrograms, often 100 mcg at a time.

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

The Protocol Pack, free

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
50 mcg	2 units	0.02 mL	100	100 days
100 mcg	4 units	0.04 mL	50	50 days
150 mcg	6 units	0.06 mL	33	33 days
200 mcg	8 units	0.08 mL	25	25 days
300 mcg	12 units	0.12 mL	16	16 days

5 mg vial in 2 mL of bacteriostatic water (2.5 mg/mL), U-100 insulin syringe, once daily.

About Hexarelin

Hexarelin is a synthetic hexapeptide growth hormone secretagogue related to GHRP-6. It produces a large growth hormone pulse per microgram, and reports consistently note that the response fades with continuous use, which is why it tends to be run in short cycles. It is not an approved medicine and is sold for research.

A 5 mg vial reconstituted with 2 mL gives 2,500 mcg/mL, so 100 mcg is 0.04 mL, or 4 units. Commonly reported doses are 100 mcg, one to three times a day. If 4 units feels too small to read, reconstitute with 3 or 5 mL rather than changing the dose.

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	0.02 mL	2 units	50
5 mg	2 mL	2.5 mg/mL	0.04 mL	4 units	50
5 mg	3 mL	1.67 mg/mL	0.06 mL	6 units	50
10 mg	1 mL	10 mg/mL	0.01 mL	1 units	100
10 mg	2 mL	5 mg/mL	0.02 mL	2 units	100
10 mg	3 mL	3.33 mg/mL	0.03 mL	3 units	100

All rows above assume a 100 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. A decay curve is only drawn where a human half-life is documented, so there is none here. Treat any precise figure for Hexarelin elsewhere with caution.

Common questions

How many units is 100 mcg of Hexarelin?: 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 100 mcg is 0.04 mL, which is 4 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 2 units, and with 3 mL it is 6 units.
How much bacteriostatic water for a 5 mg Hexarelin vial?: 2 mL is the usual choice. It gives 2.5 mg/mL, which puts the commonly reported range of 50 mcg to 300 mcg between roughly 2 and 12 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 100 mcg that is 50 doses, which at once daily is 50 days.
How many units is 100 mcg of hexarelin?: In a 5 mg vial with 2 mL of water, 4 units on a U-100 syringe. With 5 mL of water, 10 units.

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 Hexarelin?

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

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Tools

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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
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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.