Peptide Reconstitution Calculator
Draw this amount:10units
Concentration2.5 mg/mL
Volume to inject0.10 mL
Doses per vial20
How to Use This Peptide Calculator
1
Enter Peptide Amount
Input the total milligrams (mg) in your peptide vial. Common sizes: 2mg, 5mg, 10mg.
2
Add Water Volume
Enter how much bacteriostatic water (BAC water) you'll add. More water = easier to measure small doses.
3
Set Your Dose
Enter your desired dose in micrograms (mcg). The calculator shows exact syringe units to draw.
How GHRP-2 Is Dosed
GHRP-2, also known as pralmorelin, is a ghrelin-mimetic growth-hormone-releasing peptide. It is a potent growth-hormone secretagogue and is often described as causing less hunger than GHRP-6.
There is no dedicated human plasma pharmacokinetic half-life published for the peptide itself. It is short-acting, and the commonly repeated 15 to 30 minute figure is community and inference based rather than a measured value, so we do not present a half-life curve for it in the app.
Community protocols use roughly 100 to 300 mcg per subcutaneous injection, one to three times daily, usually from a 5 mg or 10 mg vial. The calculator converts your chosen mcg dose into exact syringe units.
GHRP-2 is a research compound. The doses shown are drawn from published trials or community protocols and are not clinically validated for self-administration. This tool is educational only and is not medical advice or a dosing recommendation.
GHRP-2 Dosing Reference
| Peptide | Common Vial | Cited Dose | BAC Water | Units to Draw |
|---|---|---|---|---|
| GHRP-2 | 5mg | 200mcg | 2mL | 8 units |
| GHRP-2 | 5mg | 100mcg | 2mL | 4 units |
| Ipamorelin | 5mg | 200mcg | 2mL | 8 units |
Community protocol figures, not clinically validated. For education only.
The Math Behind Peptide Reconstitution
Concentration formula:
Concentration (mg/mL) = Peptide (mg) ÷ Water (mL)Units to draw:
Units = [Dose (mcg) ÷ 1000] ÷ Concentration × 100Example: BPC-157 250mcg dose
- 5mg vial + 2mL BAC water = 2.5 mg/mL
- 250mcg = 0.25mg
- 0.25mg ÷ 2.5 mg/mL = 0.10mL
- 0.10mL × 100 = 10 units on insulin syringe
Printable reconstitution chart, free
Get the reference chart by email (concentrations, µg per 10 units, formulas, storage) to keep next to your prep space.
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Need More Than a Calculator?
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The calculator is just the start. The app is free and includes:
- Interactive body map 14 sites, smart rotation
- Weight & effects tracking correlate your results with your protocol
- Half-life curves optimize your timing
- 10 training chapters master reconstitution
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Discover Peptide LabUnderstanding Insulin Syringe Units
10 units = 0.10 mL
Quick Reference
- 100 units = 1 mL (full syringe)
- 50 units = 0.5 mL (half syringe)
- 10 units = 0.1 mL (1/10th syringe)
- 1 unit = 0.01 mL
Standard insulin syringes are U-100, meaning 100 units per mL. This calculator uses this standard.
Frequently Asked Questions
What is the half-life of GHRP-2?
No dedicated human plasma pharmacokinetic half-life has been published for GHRP-2. It is short-acting, and the widely repeated 15 to 30 minute figure is community derived, not a measured value.
What is the difference between GHRP-2 and GHRP-6?
Both are ghrelin-mimetic growth-hormone-releasing peptides. GHRP-2 is often described as a cleaner growth-hormone releaser with less appetite effect, while GHRP-6 tends to cause more hunger. Neither is clinically validated for self-use.
Is GHRP-2 the same as pralmorelin?
Yes. GHRP-2 is the research name and pralmorelin is the compound name used where it has been applied diagnostically to assess growth-hormone reserve.
What is bacteriostatic water (BAC water)?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a preservative. It prevents bacterial growth, allowing multi-use of reconstituted peptides for 4-6 weeks when refrigerated.
How much water should I add to my vial?
Common choices are 1mL, 2mL, or 3mL. More water makes small doses easier to measure accurately but means larger injection volumes. 2mL is a good balance for most peptides.
What does "units" mean on an insulin syringe?
Insulin syringes use "units" as measurements. Standard U-100 syringes have 100 units per 1mL, so 10 units = 0.10mL and 50 units = 0.50mL.
How long do reconstituted peptides last?
With bacteriostatic water, most peptides remain stable for 4-6 weeks when refrigerated at 2-8 degrees Celsius. With sterile water (no preservative), use within 24-48 hours.
Is this calculator free to use?
Yes, completely free with no signup required. For injection tracking, body maps and protocol management, see our full Peptide Lab app.