BAC water calculator
Enter your vial and your dose. It shows what each amount of water gives you, and which one is easiest to read on the syringe.
Easiest pick: add 1 mL, then draw to 5 units.
| Water added | Strength | Draw to | How it reads |
|---|---|---|---|
| 0.5 mL | 10 mg/mL | 2.5 units | Lands between marks |
| 1 mL | 5 mg/mL | 5 units | Easy to read |
| 1.5 mL | 3.33 mg/mL | 7.5 units | Lands between marks |
| 2 mL | 2.5 mg/mL | 10 units | Easy to read |
| 2.5 mL | 2 mg/mL | 12.5 units | Lands between marks |
| 3 mL | 1.67 mg/mL | 15 units | Easy to read |
| 5 mL | 1 mg/mL | 25 units | Easy to read |
Assumes a U-100 insulin syringe (100 units = 1 mL). More water doesn't change the dose in the vial. It only changes how much liquid holds each dose.
Does more water make it weaker?
No. The vial holds the same amount of peptide either way. More water just spreads each dose through more liquid, so you draw more units.
What's the math?
Strength = vial mg ÷ water mL. Volume = dose ÷ strength. Units = volume × 100.
Which amount should I pick?
One that puts your dose on a whole-unit mark, somewhere between 5 and 50 units. Tiny draws are hard to measure and big ones use up the syringe.