Peptide math, done right.

Enter the vial strength (mg), the volume of bacteriostatic water you plan to add, and your target dose. The calculator returns the exact syringe-unit reading and the concentration per mL.

Common volumes are 1 mL, 2 mL, or 3 mL. More water gives a more dilute solution and easier-to-read syringe units for small doses; less water concentrates the peptide. Pick the volume that lets your typical dose land on a clean unit mark.

No. Peptide Calculator is a research-reference tool only. Content is for informational and educational purposes and is not intended for human or veterinary administration.

Yes. Every calculator, article, and storage guide is free, with no signup. The site is supported as an open reference for the research community.