Peptide reconstitution can be confusing. This calculator helps you determine exactly how much to inject based on your vial concentration and desired dosage.
Simply enter your peptide amount, the volume of bacteriostatic water you're using to reconstitute, and your desired dose. The calculator will tell you exactly how many units to draw on your insulin syringe.
How Does the Peptide Dosage Calculator Work?
This peptide calculator uses the concentration formula to determine the exact amount you need to inject:
Concentration = Peptide Amount (mg) / Water Volume (mL)
Injection Volume (mL) = Desired Dose (mg) / Concentration
Syringe Units = Injection Volume (mL) × 100
Understanding Peptide Measurements
Peptides are typically measured in milligrams (mg) or micrograms (mcg). It's important to understand the conversion:
- 1 mg = 1,000 mcg
- 1 mL = 100 units on an insulin syringe
- Most peptide vials contain 2mg, 5mg, or 10mg of peptide
Peptide Reconstitution Guide
Reconstitution is the process of mixing your lyophilized (freeze-dried) peptide powder with bacteriostatic water. Here's the basic process:
- Remove the plastic cap from the peptide vial
- Clean the rubber stopper with an alcohol swab
- Draw your desired amount of bacteriostatic water into a syringe
- Inject the water slowly down the side of the vial (not directly onto the powder)
- Gently swirl (don't shake) until the powder is fully dissolved
- Store in the refrigerator
How to Calculate Peptide Dosage Manually
If you want to calculate peptide dosage yourself, here's a step-by-step example:
Example: You have a 5mg vial and reconstitute with 2mL of bacteriostatic water. You want a 250mcg dose.
- Convert everything to the same units: 5mg = 5,000mcg; 0.25mg = 250mcg
- Calculate concentration: 5,000mcg ÷ 2mL = 2,500mcg/mL
- Calculate injection volume: 250mcg ÷ 2,500mcg/mL = 0.1mL
- Convert to syringe units: 0.1mL × 100 = 10 units
Result: You would draw 10 units on your insulin syringe for a 250mcg dose.
Frequently Asked Questions
A properly reconstituted peptide should dissolve completely after you slowly add bacteriostatic water down the side of the vial. Avoid shaking the vial, as vigorous mixing may damage delicate peptide chains. Once fully dissolved, store the solution in the refrigerator and always inspect it before each use. If the liquid appears cloudy, discolored, or contains particles, do not use it.
For most multi-dose peptide protocols, bacteriostatic water is commonly used because it contains a preservative that helps reduce bacterial growth after reconstitution. Sterile water is typically intended for immediate use and is generally not preferred for storing reconstituted peptides over multiple injections. Always follow the instructions provided by your healthcare provider or the peptide manufacturer.
Many peptide vials are labeled in milligrams, while individual injections are often measured in micrograms. Since 1 milligram equals 1,000 micrograms, converting between the two is an important part of calculating the correct injection volume. This calculator handles those conversions so you can determine the right insulin syringe units more easily.
After calculating your injection volume, it may help to review peptide categories, reconstitution basics, storage guidance, and general product education before starting any protocol. You can explore the Peptides collection for more information, but peptide therapy should only be used under the guidance of a licensed healthcare provider.
