RedosePeptide reconstitution calculator
Enter your vial size and the bacteriostatic water you added to get the exact units to draw on a U-100 insulin syringe.
How much bacteriostatic water is already in the vial? Enter your numbers to get the exact units to draw on a U-100 insulin syringe.
About the peptide reconstitution calculator
Reconstitution is the step where you turn a freeze-dried peptide into an injectable liquid by adding bacteriostatic water. The amount of water you add sets the concentration, which decides how many units you draw for every future dose, so it is worth getting right once.
This calculator does the whole chain for you: it divides the vial amount by the water to find your concentration in mg/mL, then divides your target dose by that concentration to find the volume, and multiplies by 100 to show it as units on a standard U-100 insulin syringe.
If you would rather pick the units first and have the calculator tell you how much water to add, use the BAC water calculator instead. To check how long a reconstituted vial will last, try the vial duration calculator.
FAQ
How do I reconstitute a peptide?
Draw your chosen amount of bacteriostatic water into a syringe, inject it slowly down the inside wall of the peptide vial, and let it dissolve without shaking. The amount of water you add sets the concentration this calculator uses.
How much bacteriostatic water should I add?
There is no single correct amount, more water makes each dose easier to measure but lower in concentration. A common choice is 2 mL per 5 mg vial. Use the BAC water calculator to target a clean number of units per dose.
How do I read the result on my syringe?
The 'draw to' figure is in U-100 insulin units, the same numbers printed on a standard 1 mL insulin syringe (100 units = 1 mL). Just pull the plunger to that line.