Tool · Free

RECONSTITUTION
CALCULATOR

How many units to draw on a U-100 insulin syringe. Plug in the mg on the vial, the mL of bacteriostatic water you'll add, and the target dose, the answer updates as you type.

Inputs

Peptide in vial

From the vial label, e.g. a “BPC-157 5mg” vial = 5

Bacteriostatic water

Common: 1 mL, 2 mL, 3 mL. Smaller = more concentrated.

Desired dose

Per-injection amount, not daily total.

Draw This Much

Units on a U-100 insulin syringe

5.00IU

= 0.050 mL per dose

Concentration: 5.00 mg/mL
Per IU: 50.0 mcg
Doses per vial: 40.0
Dose in mg: 0.250 mg

How It Works

A U-100 insulin syringe divides one milliliter into 100 units. So if you reconstitute a 5 mg BPC-157 vial with 2 mL of bacteriostatic water, each mL contains 2.5 mg, and each IU (1/100th of a mL) contains 25 mcg. Ten IU then delivers a 250 mcg dose.

Changing the BAC water volume changes the concentration, not the total peptide available. A 5 mg vial gives you 5 mg of peptide whether you mix it with 1 mL or 3 mL of water, just fewer-or-more units per injection. More water = more precise dosing for small doses, less water = easier reads for larger doses.

The calculator assumes a standard U-100 insulin syringe. If you're using a tuberculin (1 mL graduated) syringe, the “volume per dose” number in milliliters is what you want instead of the IU figure.

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