Peptide Reconstitution Calculator

It converts the three values every researcher needs — vial size (mg), bacteriostatic water added (mL), and target dose per injection (mcg or mg) — into the exact number of insulin-syringe units to draw. This removes the manual arithmetic error that's the most common source of dosing mistakes in peptide research.

Concentration is vial mass divided by BAC water volume. Volume per dose is target dose divided by concentration. Syringe units are that volume scaled to the syringe markings — a 1 mL insulin syringe is graduated into 100 units, so 0.1 mL = 10 units. The calculator does all three steps and shows the intermediate concentration so you can verify it.

1 mL (100 unit) insulin syringes are the most common choice in peptide research because the 100-unit scale gives single-unit precision for typical sub-millilitre doses. 0.5 mL (50 unit) and 0.3 mL (30 unit) syringes give finer resolution for very small doses. Choose the smallest syringe that comfortably fits your dose volume without overdrawing.

Most researchers reconstitute a 10 mg peptide vial with 1–2 mL of bacteriostatic water. More water means a lower concentration and a larger volume to draw per dose, which improves dosing accuracy but increases the volume injected. Stronger concentrations (less water) are useful when target doses are large.

No — the math is purely volumetric. The presets pre-fill commonly used research starting values for popular peptides but they are not protocol recommendations. Your reconstitution volume, dose, and frequency should follow your own research protocol or the published literature for the compound.

Reconstituted peptide solutions are typically stable for 28 days when stored at 2–8°C (refrigerated) and prepared with bacteriostatic water (which contains 0.9% benzyl alcohol as a preservative). Lyophilised vials remain stable for up to 24 months at -20°C. See our Peptide Storage Guide for full guidance.