How the AOD-9604 calculator works
Lyophilized (freeze-dried) powder in a sealed vial, labelled in milligrams. The quick-fill buttons in the calculator are the vial sizes AOD-9604 is commonly labelled in (2 mg and 5 mg). If yours is different, type it in.
Amounts of AOD-9604 are usually written in micrograms (mcg), so the calculator opens in mcg.
AOD-9604 is not the same molecule as “HGH Fragment 176-191”, which lacks the added tyrosine. The two are sold under similar names, so check the label. The arithmetic is by weight and is the same for both.
For a field-by-field walkthrough and a guide to syringe types, see the main peptide calculator.
AOD-9604 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 |
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 AOD-9604 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.
AOD-9604: 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.
AOD-9604 is a synthetic peptide of 16 amino acids: the last 15 amino acids of human growth hormone (residues 177 to 191) with a tyrosine added at the front. It was developed in Australia by Metabolic Pharmaceuticals.
It reached a phase 2b trial, the OPTIONS study, in which 536 people took it by mouth for 24 weeks. The trial did not meet its primary endpoint, and the company ended development in 2007.
It has not been approved as a medicine by any regulator.
- Class
- Modified fragment of human growth hormone
- Group
- Growth hormone and IGF-1 axis
- Also known as
- AOD9604
- Molecular weight
- About 1,815 Da
- Half-life
- Not established. No widely accepted human half-life for injected AOD-9604 has been published. The main clinical trials gave it by mouth.
- Regulatory status
- Not approved as a medicine. AOD-9604 is not approved as a medicine by the FDA, the EMA or any other major regulator. Its position in US pharmacy compounding has changed since 2023, so check the FDA’s current bulk drug substances lists for the present status.
- Status in sport
- Prohibited at all times under the WADA Prohibited List (section S2), where AOD-9604 is named among the growth hormone fragments.
- Labelled vial sizes
- 2 mg and 5 mg
Arithmetic slips to watch for with AOD-9604
Similar names, different molecules
AOD-9604 and “HGH Fragment 176-191” are often listed side by side and sometimes confused. A number worked out for one vial does not describe the other product, even though the concentration arithmetic is identical.
A 2 mg vial and a 5 mg vial
With 1 mL of water a 2 mg vial is 2 mg/mL, or 20 mcg per unit on a U-100 syringe. With 2 mL a 5 mg vial is 2.5 mg/mL, or 25 mcg per unit. Similar concentrations can come from quite different vials, so always start from your own label.
What this page does not do
The calculator performs mathematical conversions only. It does not recommend, suggest or verify any AOD-9604 dose or schedule, it does not say how much water to add, and it does not say what AOD-9604 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
- AOD9604, development history (Wikipedia, with primary references)
- Moré and Kenley, Safety and metabolism of AOD9604, Journal of Endocrinology and Metabolism
- WADA Prohibited List
Facts last checked: September 2026. Regulatory status changes, so check the regulator’s own pages for the current position.
