Reconstitution is the process of adding a solvent (typically bacteriostatic water) to a lyophilised peptide vial to dissolve the powder into an injectable solution. The amount of water you add determines the concentration of the final solution and how many units you need to draw from a syringe to deliver a given dose.

A U-100 insulin syringe is calibrated so that 100 units equals 1 millilitre of fluid. The markings on the barrel run from 0 at the needle end to the maximum volume at the plunger end. A 1 mL syringe shows 0-100 units, a 0.5 mL shows 0-50 units, and a 0.3 mL shows 0-30 units. Each minor tick typically represents 1 or 2 units. U-100 is the global standard for insulin and peptide research dosing.

First calculate concentration (mg per mL) by dividing the total mg of peptide in the vial by the mL of bacteriostatic water you added. Convert to mcg per mL by multiplying by 1000. Then divide your desired dose in mcg by the mcg per mL to get volume in mL. Multiply that volume by 100 to get units on a U-100 syringe. This calculator does all of that automatically.

Bacteriostatic water is sterile water for injection containing 0.9 percent benzyl alcohol as a preservative, which inhibits bacterial growth in multi-use vials. The volume you use is flexible — more water gives a more dilute solution that is easier to draw accurately but means larger volumes per dose, while less water gives a more concentrated solution. Common reconstitution volumes are 1 to 5 mL depending on vial size and personal preference.

Concentration in mg per mL is the total mg of peptide in the vial divided by the volume of bacteriostatic water in mL. For example, 10 mg of peptide reconstituted with 2 mL of water gives a concentration of 5 mg per mL, or 5000 mcg per mL.

Divide the total amount of peptide in the vial by your per-dose amount. For example, a 10 mg vial dosed at 250 mcg (0.25 mg) gives 40 doses (10 divided by 0.25). This calculator displays doses per vial automatically and the cycle mode projects how many vials you need for a full cycle.

All products sold by Purity Peptides are supplied for in-vitro research and laboratory use only. They are not manufactured, intended, or approved for human or veterinary consumption, diagnosis, treatment, or prevention of any disease. This calculator is a research tool for computing reconstitution math. It does not constitute medical advice and should not be interpreted as dosing guidance for human use.

Every Purity Peptides product ships with a batch-specific Certificate of Analysis (COA) from an independent laboratory confirming peptide identity and purity by HPLC analysis. Always verify a COA before using any research peptide, and check that the batch number on the vial matches the COA.

Yes, some researchers blend compatible peptides like CJC-1295 and Ipamorelin in a single vial to simplify dosing. When peptides share a vial and reconstitution volume, drawing a given volume delivers a proportional dose of every peptide based on its concentration. The blend mode on this calculator handles that math for you and identifies which peptide runs out first.

Keep lyophilised (powder) vials refrigerated or frozen for long-term storage. Once reconstituted, store the solution refrigerated at 2-8 degrees Celsius and use within the timeframe recommended for that specific peptide. Avoid repeated freeze-thaw cycles and protect from light. Full storage guidance is available on the Purity Peptides FAQ page.

Yes. Every calculation is encoded in the page URL. Use the Copy Link button in the results panel to share your exact setup with a colleague, or bookmark the URL to come back to it later. You can also print a calculation label with the Print button.

Yes. Toggle the sun/moon icon in the top right of the calculator to switch between light and dark themes. Your preference is saved locally and persists across sessions.