How the Sermorelin calculator works
Usually a lyophilized (freeze-dried) powder in a pharmacy-labelled vial, with the diluent volume stated on the label. The quick-fill buttons in the calculator are the vial sizes Sermorelin is commonly labelled in (2 mg, 5 mg, 9 mg and 15 mg). If yours is different, type it in.
Amounts of Sermorelin are usually written in micrograms (mcg), so the calculator opens in mcg.
A compounded vial comes with its own label and instructions, including how much diluent to add. Use that volume here, not a figure from this page.
For a field-by-field walkthrough and a guide to syringe types, see the main peptide calculator.
Sermorelin concentration table
Each labelled vial size at the same three round water volumes used across this site. It shows how the arithmetic behaves and is not a suggestion of what to use.
| Vial | Water added | Concentration | Each mark holds |
|---|---|---|---|
| 2 mg vial | 1 mL | 2 mg/mL | 20 mcg per unit |
| 2 mg vial | 2 mL | 1 mg/mL | 10 mcg per unit |
| 2 mg vial | 3 mL | 0.67 mg/mL | 6.7 mcg per unit |
| 5 mg vial | 1 mL | 5 mg/mL | 50 mcg per unit |
| 5 mg vial | 2 mL | 2.5 mg/mL | 25 mcg per unit |
| 5 mg vial | 3 mL | 1.67 mg/mL | 16.7 mcg per unit |
| 9 mg vial | 1 mL | 9 mg/mL | 90 mcg per unit |
| 9 mg vial | 2 mL | 4.5 mg/mL | 45 mcg per unit |
| 9 mg vial | 3 mL | 3 mg/mL | 30 mcg per unit |
| 15 mg vial | 1 mL | 15 mg/mL | 150 mcg per unit |
| 15 mg vial | 2 mL | 7.5 mg/mL | 75 mcg per unit |
| 15 mg vial | 3 mL | 5 mg/mL | 50 mcg per unit |
Every row for a given vial holds the same total. To compare volumes for a specific reading, use the BAC water calculator.
The formula, step by step
The “Try example numbers” button uses one fixed rule on every page: the smallest labelled vial, 2 mL of water, and whatever amount lands on the 10-unit mark. The amount is a by-product of that rule and not a typical or suggested Sermorelin dose.
- Concentration: 2 mg ÷ 2 mL = 1 mg/mL.
- The 10-unit mark is 10 ÷ 100 = 0.1 mL, which holds 0.1 × 1 = 0.1 mg (100 mcg).
- Run it forwards to check: 0.1 mg ÷ 1 mg/mL = 0.1 mL, and 0.1 × 100 = 10 units.
Sermorelin: general reference
General educational reference for research purposes only. None of it is a recommendation, none of it is medical advice, and none of it is used by the calculator, which works only on the numbers you enter.
Sermorelin is the first 29 amino acids of human growth hormone-releasing hormone (GHRH), the shortest fragment that keeps the hormone’s full activity.
The FDA approved it in 1997 under the brand name Geref. The manufacturer stopped selling it in 2008, and in 2013 the FDA formally determined that it had not been withdrawn for reasons of safety or effectiveness.
That history shapes how it is found today. No approved sermorelin product is on the market, and in the United States it is prepared by compounding pharmacies on prescription, which is why it usually comes as a pharmacy-labelled vial.
Geref itself was sold in vials of 0.5 mg and 1 mg, much smaller than the compounded vials in circulation now.
- Class
- GHRH analog, formerly an approved medicine
- Group
- Growth hormone and IGF-1 axis
- Also known as
- GHRH (1-29), Geref
- Molecular weight
- About 3,358 Da
- Half-life
- About 11 to 12 minutes. The Geref label gave a half-life of 11 to 12 minutes after either intravenous or subcutaneous administration.
- Regulatory status
- Formerly approved (United States). Sermorelin was an FDA-approved medicine from 1997 until the brand was discontinued in 2008. No approved product is marketed today. In the United States it is available as a compounded preparation on prescription.
- Status in sport
- Prohibited at all times under the WADA Prohibited List (section S2), where sermorelin is named among the GHRH analogues.
- Labelled vial sizes
- 2 mg, 5 mg, 9 mg and 15 mg
Arithmetic slips to watch for with Sermorelin
The pharmacy label comes first
A compounding pharmacy states the diluent volume and often the resulting concentration. If the concentration is already printed, the first step is done for you, and the calculator should reproduce the same figure from the vial size and the volume.
Large vials, microgram amounts
A 15 mg vial is 15,000 mcg. With 3 mL of diluent that is 5 mg/mL, or 50 mcg per unit on a U-100 syringe. A 9 mg vial with the same 3 mL is 3 mg/mL, or 30 mcg per unit.
What this page does not do
The calculator performs mathematical conversions only. It does not recommend, suggest or verify any Sermorelin dose or schedule, it does not say how much water to add, and it does not say what Sermorelin is for, whether it is safe, or whether it is legal where you live. It is not medical advice, diagnosis or treatment, and Peptrack does not sell, supply or endorse any substance.
Always confirm measurements with a licensed healthcare provider or pharmacist. See the full disclaimer.
Sources
- Federal Register (2013): determination that Geref was not withdrawn for reasons of safety or effectiveness
- Sermorelin acetate label information, RxList
- WADA Prohibited List
Facts last checked: September 2026. Regulatory status changes, so check the regulator’s own pages for the current position.
