Free tool
Peptide reconstitution calculator
Enter your vial size, the amount of bacteriostatic water you added, and your target dose. We'll show you exactly how many units to draw on a standard U-100 insulin syringe — plus concentration and doses per vial.
—
to draw on a U-100 syringe
Volume to draw—
Concentration—
Doses per vial—
Enter your values to see results.
This is a math tool, not dosing advice. It only converts the numbers you enter. It does not recommend a dose, frequency or whether any peptide is safe or legal for you. Always follow professional medical guidance and your local laws.
How the calculation works
1. Concentration
Total micrograms in the vial ÷ millilitres of water = mcg per mL. A 5 mg vial in 2 mL gives 2,500 mcg/mL.
2. Volume per dose
Your desired dose (mcg) ÷ concentration (mcg/mL) = the millilitres to draw for a single dose.
3. Units
Multiply that volume by 100, because a U-100 insulin syringe has 100 units per millilitre.