Peptide Calculator
Calculate how many units to draw on your insulin syringe for a given research protocol. Pick your syringe, vial size, reconstitution volume, and target dose.
Step 1: Syringe size
Step 2: Vial size (mg)
Step 3: Reconstitution volume (ml)
Common research dose ranges. Enter your own protocol value if different.
Step 4: Desired dose (mcg)
Draw to 5 units
This calculator is provided for general information only. It is not medical or dosing advice. All products are for research use only. Consult appropriate professional guidance for any human application.
How the calculator works
The calculator combines four inputs (syringe size, vial strength in mg, volume of BAC water added, and target dose in mcg) and outputs the corresponding number of units on a standard U-100 insulin syringe. All math runs client-side in real time; no input is stored or transmitted.
What is reconstitution?
Research peptides ship as a lyophilized (freeze-dried) powder inside a sealed vial. Before any laboratory use, the powder must be dissolved in a sterile diluent, typically bacteriostatic water (BAC water). The chosen volume sets the final concentration, which in turn determines how many units are drawn for any given dose.
How dosing math works
Concentration in mcg/ml equals vial strength (mg × 1000) divided by the reconstitution volume in ml. The liquid volume needed per dose equals the target dose in mcg divided by the concentration. Because a U-100 syringe counts 100 units per ml, units fall directly out of the volume.
Why syringe size matters
A 0.3 ml/30 U syringe spaces each unit mark further apart than a 1.0 ml/100 U syringe, allowing finer reading at small volumes. If the calculated dose exceeds syringe capacity, either a larger syringe, a more dilute concentration (more BAC water), or splitting into multiple draws is required.