Understanding This Calculator
Reconstituting a lyophilized (freeze-dried) peptide means adding a liquid — typically bacteriostatic or sterile water — to the vial to create a solution of a known concentration. Once the concentration is known, a target dose can be converted into the volume that must be drawn up, which is then commonly read off the markings on a standard U-100 insulin syringe (100 units per mL).
Reconstitution ratios directly affect precision: a more dilute solution means a larger, easier-to-measure volume per dose, while a more concentrated solution means smaller, harder-to-measure volumes — both use cases this tool can help estimate.
- Vial total peptide mass in the vial, mg
- Water diluent volume added, mL
- Units insulin syringe units = Volume (mL) × 100
Frequently Asked Questions
Why convert the result to insulin syringe units?
U-100 insulin syringes are commonly available and finely graduated, making them a practical tool for measuring the small volumes typical of reconstituted peptide solutions. 100 units corresponds to 1 mL on this syringe type.
Does the diluent amount change the total peptide content?
No. Adding more or less water changes only the concentration (how much peptide is in each mL), not the total amount of peptide in the vial.