Dosage
calculator

Enter three numbers: the amount of peptide in the vial (mg), the volume of bacteriostatic water you add (mL), and the dose you want to draw (mcg or mg). The calculator returns the concentration of the mixed solution, the exact volume to draw, the corresponding tick mark on a U-100 insulin syringe, and how many doses the vial yields.

Peptides ship as a freeze-dried (lyophilized) powder. Reconstitution means dissolving that powder in a sterile diluent — typically bacteriostatic water — so it can be measured and drawn as a liquid. The amount of water you add sets the concentration of the final solution.

There is no single correct amount — adding more or less water changes the concentration, not the dose. A practical target is a volume that makes your usual dose land on an easy-to-read syringe mark. Most 2–10 mg vials are reconstituted with 1–3 mL. Use the calculator to preview how different volumes translate to syringe units.

U-100 insulin syringes are marked in units, where 100 units equals 1 mL. Multiply your draw volume in mL by 100 to get units. Example: a 5 mg vial reconstituted with 2 mL gives 2.5 mg/mL; a 250 mcg dose is 0.1 mL, which is 10 units.

1 milligram (mg) equals 1,000 micrograms (mcg). Vial contents are usually listed in mg while research doses are often quoted in mcg, so unit mix-ups are the most common calculation error — the calculator handles the conversion for you.

For a vial containing more than one peptide — like a BPC-157 + TB-500 repair blend or a Semax + Selank cognitive blend — use Blend mode. Enter each peptide's amount in the vial and the total water added, then set your target dose to either the total blend or one specific peptide. The calculator returns the syringe units to draw plus a per-peptide breakdown showing exactly how many mg and mcg of each compound land in that single draw.

Once reconstituted with bacteriostatic water, most peptides are kept refrigerated at 2–8 °C and remain usable for several weeks, though stability varies by compound. Unreconstituted lyophilized vials last far longer when stored cold and away from light. Check the storage notes on each product page.