GHRP-6 reconstitution calculator.
A 5 mg vial of GHRP-6 dissolved in 2 mL of bacteriostatic water is 2,500 mcg per mL, which is 25 mcg per unit on a U-100 insulin syringe.
GHRP-6 is the original synthetic growth hormone secretagogue, sold in the same 5 mg and 10 mg vials as GHRP-2 and discussed at the same microgram figures. Its human research is largely acute GH testing, often intravenous, with amounts written per kilogram of body weight, which is a different kind of number from the total amount in mcg this calculator needs.
Reference range often cited for GHRP-6: 100–300 mcg, shown for orientation only, not a recommendation. Enter your own target below. Read the evidence →
Each unit on a 100u · 1.0 mL syringe ≈ 25 mcg of this solution.
Show the math
More water → lower concentration → more units for the same amount.
How much bacteriostatic water for a GHRP-6 vial?
There is no single correct volume. More water gives a weaker solution, so each unit on the syringe holds less GHRP-6 and a given amount takes more units to measure, which is easier to read on the syringe scale. Less water does the opposite. These tables show the concentration for each common vial size across the usual volumes. They are arithmetic, not a recommendation of how much to take.
| BAC water | Concentration | Per 1 unit | Per 10 units |
|---|---|---|---|
| 1 mL | 5,000 mcg/mL | 50 mcg | 500 mcg |
| 1.5 mL | 3,333 mcg/mL | 33.3 mcg | 333 mcg |
| 2 mL | 2,500 mcg/mL | 25 mcg | 250 mcg |
| 2.5 mL | 2,000 mcg/mL | 20 mcg | 200 mcg |
| 3 mL | 1,667 mcg/mL | 16.7 mcg | 167 mcg |
| BAC water | Concentration | Per 1 unit | Per 10 units |
|---|---|---|---|
| 1 mL | 10,000 mcg/mL | 100 mcg | 1,000 mcg |
| 1.5 mL | 6,667 mcg/mL | 66.7 mcg | 667 mcg |
| 2 mL | 5,000 mcg/mL | 50 mcg | 500 mcg |
| 2.5 mL | 4,000 mcg/mL | 40 mcg | 400 mcg |
| 3 mL | 3,333 mcg/mL | 33.3 mcg | 333 mcg |
How many units of GHRP-6 is a given amount?
Divide the amount in micrograms by the micrograms per unit for your mix. With a solution of 2,500 mcg per mL, one unit on a U-100 syringe holds 25 mcg, so any amount in mcg divided by 25 gives the units. The calculator above does this for you from your own vial and water, and the tables give the per-unit figure for each common mix.
Why does GHRP-6 need its own calculation?
- 5 mg in 2 mL is 2,500 mcg/mL, so 100 mcg is 4 units and 200 mcg is 8 units. A 10 mg vial in the same 2 mL halves both readings.
- A per-kilogram figure is not an amount that can be entered here, and an intravenous research figure describes a different route from a subcutaneous vial. The calculator only works with a total in mcg or mg.
- Because GHRP-2 and GHRP-6 share vial sizes, a unit count copied from one matches the other only when vial mass and water volume are identical. That is the arithmetic coinciding, not the compounds being interchangeable.
How is GHRP-6 administered, and what does the math look like?
How GHRP-6 is actually administered, with the concentration arithmetic written out. Amounts in these tables are illustrative examples of the math, never a recommendation.
GHRP-6: research formats
Choose the format you are researching to see route-specific notes.
Older ghrelin mimetic; stronger appetite drive than GHRP-2 at the same dose.
GHRP-6 has essentially the same injection format as GHRP-2: 5 mg vials reconstituted with 2.0 mL BAC water for 2,500 mcg/mL. The key practical difference is that GHRP-6 produces a notably stronger appetite stimulus than GHRP-2 at comparable doses.
GHRP-6 reconstitution: common questions
How many units is 150 mcg of GHRP-6?
On 5 mg in 2 mL (2,500 mcg/mL) it is 6 units. On 5 mg in 5 mL (1,000 mcg/mL) it is 15 units, the same amount spread further up the barrel.
Can I use a GHRP-2 chart for GHRP-6?
Only when the vial and water match, because a chart describes a concentration, not a compound. The two are different molecules, GHRP-6 drives appetite more strongly, and the profiles cover the differences. The arithmetic does not know which one is in the vial.
Is GHRP-6 approved anywhere?
No. It is not approved by the FDA or other major regulators for any indication, is sold as a research-use-only compound, and is prohibited in sport by WADA as a growth hormone secretagogue.
What the evidence on GHRP-6 actually shows
Knowing the concentration is not the same as knowing whether to use it. These are the strongest studies behind the GHRP-6 profile, labelled with the study type PubMed itself assigns.
- Review · 1998Growth hormone-releasing peptide (GHRP)Cellular and molecular life sciences : CMLS · PMID 9893708
- Journal article · 2016Growth Hormone-Releasing Peptide 6 Enhances the Healing Process and Improves the Esthetic Outcome of the WoundsPlastic surgery international · PMID 27200188
- Journal article · 2006Use of growth-hormone-releasing peptide-6 (GHRP-6) for the prevention of multiple organ failureClinical science (London, England : 1979) · PMID 16417467
This page is arithmetic on numbers you enter. It does not recommend an amount of GHRP-6, and nothing here is medical advice. For what the published evidence actually supports, read the GHRP-6 profile, and for regulatory status see is GHRP-6 legal. Reviewed June 1, 2026.
Different question? The general reconstitution calculator covers every compound on the site, the blend calculator handles multi-peptide stacks, and vial longevity turns a vial into weeks of supply.
PepCue remembers your GHRP-6 vial, concentration, and draw, then tracks every dose against it. Free.