How the Math Works
Reconstitution is simple arithmetic. When you dissolve a lyophilized peptide vial in bacteriostatic water, the concentration is the peptide mass divided by the water volume:
- Concentration (mg/mL) = peptide in vial (mg) ÷ bacteriostatic water (mL)
- Volume per draw (mL) = target amount (mg) ÷ concentration (mg/mL)
- Syringe units = volume (mL) × 100 (on a U-100 syringe, 1 mL = 100 units)
Example: a 10 mg vial reconstituted with 2 mL of bacteriostatic water gives a concentration of 5 mg/mL. To measure 250 mcg (0.25 mg) you would draw 0.05 mL — which is 5 units on a U-100 syringe.
Using the Calculator
Enter the vial amount
Take the milligram figure from the product label or the batch COA.
Enter the bacteriostatic water
Enter how much water you will add. More water = lower concentration = larger draw volumes.
Enter the target amount
Enter the amount you want to measure out, in micrograms or milligrams.
Read the results
The tool returns concentration, draw volume, and syringe units instantly as you type.
Review the Lyophilized Storage Guide for correct handling — add water slowly down the vial wall, refrigerate the solution, and use it within the working window.
This calculator performs research measurement math only. All compounds are sold strictly for laboratory and in-vitro research. It is not dosing, medical, or therapeutic guidance, and outputs are not instructions for human use.