Peptide Mixing Chart
A lookup table for the two numbers that come up every time you mix a vial: the concentration you end up with, and how many units that makes you draw. No arithmetic required — find your vial size, find your water volume, read the cell.
Illustrative reference only — nothing here recommends a dose or a mixing volume.
Concentration by vial size and water volume
Concentration is simply the peptide in the vial divided by the water you add, so the same vial can be any strength you like. Adding less water makes a stronger mix and a smaller draw; adding more makes a weaker mix and a larger, easier-to-read draw.
| Vial | 1 mL | 2 mL | 3 mL | 5 mL |
|---|---|---|---|---|
| 2 mg | 2 | 1 | 0.667 | 0.4 |
| 5 mg | 5 | 2.5 | 1.667 | 1 |
| 10 mg | 10 | 5 | 3.333 | 2 |
| 15 mg | 15 | 7.5 | 5 | 3 |
| 20 mg | 20 | 10 | 6.667 | 4 |
| 30 mg | 30 | 15 | 10 | 6 |
| 50 mg | 50 | 25 | 16.667 | 10 |
To read this as mcg/mL instead, multiply by 1,000 — a 2.5 mg/mL mix is 2,500 mcg/mL.
Units to draw, by mix strength and dose
Once you know the concentration, the draw follows: divide your dose by the concentration to get millilitres, then multiply by 100, because a U-100 syringe is marked 100 units per millilitre.
| Mix | 100 mcg | 250 mcg | 500 mcg | 1,000 mcg | 2,000 mcg |
|---|---|---|---|---|---|
| 1 mg/mL | 10 u | 25 u | 50 u | 100 u | >100 u |
| 2 mg/mL | 5 u | 12.5 u | 25 u | 50 u | 100 u |
| 2.5 mg/mL | 4 u | 10 u | 20 u | 40 u | 80 u |
| 5 mg/mL | 2 u | 5 u | 10 u | 20 u | 40 u |
| 10 mg/mL | 1 u | 2.5 u | 5 u | 10 u | 20 u |
Draws under about 2 units are hard to measure accurately; anything over 100 units won't fit in a 1 mL syringe in one go. Both are signs to change the water volume rather than the dose.
Open the live calculatorThe chart covers the common combinations. For any vial, water volume and dose — including a target draw worked backwards into a water volume — use the reconstitution calculator.