Peptide reconstitution calculator
Enter the numbers printed on your own vial and the volume of bacteriostatic water you intend to add. The calculator returns concentration, draw volume and syringe units. It suggests nothing on its own.
Inputs
Total mass of lyophilised powder in the vial.
Volume of diluent you will add to the vial.
Quick pick:
Your own figure — nothing is prefilled.
Results
Fill in all four fields to see concentration, draw volume and syringe units.
Reconstituting your vial
Reconstitution is adding liquid, almost always bacteriostatic water, to a freeze-dried (lyophilized) peptide so you can measure and inject it.
- 01
Clean both stoppers. Wipe the bacteriostatic water vial and peptide vial with alcohol before puncturing either one.
- 02
Draw the water first. Pull the prescribed amount of bacteriostatic water into the syringe before adding anything to the peptide vial.
- 03
Add the water slowly. Aim the stream down the inside wall of the peptide vial instead of blasting the powder directly.
- 04
Swirl gently. Roll or swirl the vial until the powder dissolves. Do not shake it hard.
- 05
Refrigerate after mixing. Keep the reconstituted vial cold and protected from light unless your prescriber or pharmacy gives different storage instructions.
Get your target dose from a licensed provider — this calculator handles the arithmetic, not the protocol.
Common reconstitution ratios
Starting points, not recommendations — set your own dose with a clinician. Select a row to load it into the calculator.
| Peptide | Vial | BAC water | Concentration | Example dose → units (U-100) |
|---|---|---|---|---|
| 5 mg | 2 mL | 2.5 mg/mL | 250 mcg → 10 units | |
| 10 mg | 3 mL | 3.333 mg/mL | 2 mg → 60 units | |
| 5 mg | 2 mL | 2.5 mg/mL | 200 mcg → 8 units | |
| 2 mg | 2 mL | 1 mg/mL | 100 mcg → 10 units | |
| 5 mg | 2 mL | 2.5 mg/mL | 200 mcg → 8 units | |
| 10 mg | 2 mL | 5 mg/mL | 1 mg → 20 units |