Reconstitution calculator
Peptides arrive as freeze-dried powder; insulin syringes speak in units. Somewhere between the two, people invent creative math and dose at 10× — usually at 7 a.m., pre-coffee. This does the conversion properly: enter what’s in the vial, how much bacteriostatic water you added, and the dose you want. I’ll tell you exactly where to draw to.
units = dose ÷ (mg in vial ÷ ml of water) × 100
Common combos
The usual suspects, precomputed. If your setup is here, you don’t even need the inputs above.
| Vial | Bac water | Dose | Draw to | Doses/vial |
|---|---|---|---|---|
| 5 mg | 2 ml | 250 mcg | 10 units | 20 |
| 5 mg | 2.5 ml | 250 mcg | 12.5 units | 20 |
| 5 mg | 3 ml | 500 mcg | 30 units | 10 |
| 10 mg | 2 ml | 1 mg | 20 units | 10 |
| 10 mg | 3 ml | 500 mcg | 15 units | 20 |
| 2 mg | 2 ml | 100 mcg | 10 units | 20 |
How the math works
Three divisions, no pharmacy degree. Concentration first: 5 mg of peptide into 2 ml of water is 2.5 mg/ml. Your dose divided by concentration is the volume: 250 mcg (0.25 mg) ÷ 2.5 mg/ml = 0.1 ml. A U-100 insulin syringe reads 100 units per ml, so 0.1 ml sits at the 10-unit mark. The water amount is your one free choice — more water means the same dose lands on a bigger, easier-to-read number.
New to all this? Read the reconstitution and dosing guide first — why bac water, how to mix without wrecking the peptide, storage, and the classic screwups.
