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-6 Is Dosed
GHRP-6 is a six-amino-acid growth-hormone-releasing peptide that mimics ghrelin. Alongside a growth-hormone pulse it is well known for a strong increase in appetite.
The one human pharmacokinetic measurement puts its terminal elimination half-life at about 2.5 hours after an intravenous bolus in healthy men (Cabrales et al., 2013, PMID 23099431). That figure was measured after IV dosing, so the effective duration after a subcutaneous injection may differ.
Community protocols use roughly 100 to 300 mcg per subcutaneous injection, one to three times daily, typically from a 5 mg or 10 mg vial. The calculator converts your chosen mcg dose into exact units.
GHRP-6 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-6 Dosing Reference
| Peptide | Common Vial | Cited Dose | BAC Water | Units to Draw |
|---|---|---|---|---|
| GHRP-6 | 5mg | 200mcg | 2mL | 8 units |
| GHRP-6 | 5mg | 100mcg | 2mL | 4 units |
| CJC-1295 | 2mg | 100mcg | 2mL | 10 units |
Community protocol figures, not clinically validated. For education only.
GHRP-6 Dosage Chart: Reconstitution and Syringe Units
A ghrp-6 dosage chart answers one question: once the vial is reconstituted, how many units on an insulin syringe correspond to a given amount. That is arithmetic, and it is identical for every peptide, so the chart below applies to GHRP-6 exactly as it does to any other compound. It is not a protocol and it recommends no amount: what amount is appropriate for a person, if any, is a question for a qualified healthcare professional.
Reconstitution chart, using 2 mL of bacteriostatic water:
| Vial strength | Concentration | 1 syringe unit delivers | Units for 250 mcg | Units for 500 mcg | Units for 1 mg |
|---|---|---|---|---|---|
| 2 mg | 1 mg/mL | 10 mcg | 25 | 50 | 100 |
| 5 mg | 2.5 mg/mL | 25 mcg | 10 | 20 | 40 |
| 10 mg | 5 mg/mL | 50 mcg | 5 | 10 | 20 |
| 20 mg | 10 mg/mL | 100 mcg | 2.5 | 5 | 10 |
| 50 mg | 25 mg/mL | 250 mcg | 1 | 2 | 4 |
An insulin syringe unit is 0.01 mL, so one unit always delivers the concentration multiplied by 10 in micrograms. That single fact is what the whole chart is built on.
Using a different volume of water: the chart scales linearly. With 1 mL of bacteriostatic water the concentration doubles, so use half the units shown. With 3 mL it drops by a third, so use 1.5 times the units shown. The calculator at the top of this page does this for any combination, including volumes that are not round numbers.
Reference values only. Verify every calculation against your own vial before any handling, and remember that a reconstituted vial must be stored refrigerated.
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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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.
Where to buy
Prices and stock are set by each vendor and can change. Always confirm third-party testing on the vendor site.
Frequently Asked Questions
What is the half-life of GHRP-6?
A human study measured a terminal half-life of about 2.5 hours after an intravenous bolus (Cabrales et al., 2013, PMID 23099431). No subcutaneous pharmacokinetic study exists, so the duration after a normal SC injection may be different.
Why does GHRP-6 cause hunger?
GHRP-6 mimics ghrelin, the hormone that signals hunger, so a sharp rise in appetite is one of its most reported effects. This is a commonly cited difference from GHRP-2.
What is the difference between GHRP-6 and GHRP-2?
Both are ghrelin-mimetic growth-hormone-releasing peptides. GHRP-6 tends to cause more hunger, while GHRP-2 is often described as a cleaner growth-hormone releaser with less appetite effect. Neither is clinically validated for self-use.
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.
What is the GHRP-6 dosage chart?
It is the conversion between a reconstituted GHRP-6 vial and syringe units. Divide the vial strength in mg by the bacteriostatic water in mL to get the concentration, then multiply by 10 to get the micrograms delivered by one insulin unit. With a 5 mg vial in 2 mL, one unit delivers 25 mcg, so 250 mcg is 10 units. The chart on this page lays out the common vial strengths. It states no recommended amount.
How many units of GHRP-6 is 250 mcg?
It depends entirely on how the vial was reconstituted, not on the peptide. With 2 mL of bacteriostatic water: a 2 mg vial gives 25 units, a 5 mg vial 10 units, a 10 mg vial 5 units. Halve those numbers if only 1 mL of water was used. Whether 250 mcg is an appropriate amount is a separate question, and one for a healthcare professional.