Tool
Peptide Calculator
Select your syringe, vial quantity, bacteriostatic water amount, and desired dose. The syringe illustration tracks the calculated draw against your syringe capacity.
Units means U-100 insulin-syringe gradations (1 mL = 100 units), not International Units. If a draw exceeds your syringe, split the dose or use a higher concentration.
1 · Syringe volume
2 · Vial quantity
3 · Bacteriostatic water
4 · Desired dose
Calculator FAQ
What does "units" mean?
Units are the gradations on a U-100 insulin syringe. 1 mL = 100 units, so 0.25 mL = 25 units. This is a volume measure, not International Units (IU).
Why does my draw exceed the syringe?
At a low concentration a larger dose needs more volume than the syringe holds. Use less water (higher concentration), a larger syringe, or split the dose across injections.
Does vial size change my biological dose?
No. A larger vial at the same water volume is more concentrated, so the same milligram dose is a smaller unit draw. The biological dose is unchanged - only the draw on the syringe changes.