Peptide reconstitution calculator

Work out exactly how many units to draw, the concentration, and how many doses you'll get per vial — and the best water amount to land your dose on a clean syringe mark.

How reconstitution math works

Reconstitution is mixing a lyophilized (freeze-dried) peptide with bacteriostatic water so you can draw an accurate dose. The units you draw follow one formula: units = dose (mcg) × water (mL) ÷ (vial mg × 10).

A useful thing to know: the amount of water doesn't change how many doses are in the vial — it only changes the concentration, i.e. how many units you draw for the same dose. More water = a larger, easier-to-read draw on the syringe.

Open the calculator (needs JavaScript). For educational and tracking purposes only — not medical advice.