Peptide dosage chart
Syringe units to milligrams and micrograms for common vial sizes and water volumes, read off a U-100 insulin syringe.
The amount printed on the vial label.
The volume added to the vial.
Concentration
5 mg/mL
5 mg in 1 mL. One unit on a U-100 syringe is 0.01 mL, so each unit holds 0.05 mg (50 mcg).
- 10 units
- 0.5 mg
- 50 units
- 2.5 mg
- Draws of 10 units in the vial
- 10
| Units | Volume | Peptide (mg) | Peptide (mcg) |
|---|---|---|---|
| 5 | 0.05 mL | 0.25 | 250 |
| 10 | 0.1 mL | 0.5 | 500 |
| 15 | 0.15 mL | 0.75 | 750 |
| 20 | 0.2 mL | 1 | 1000 |
| 25 | 0.25 mL | 1.25 | 1250 |
| 300.3 mL syringe full | 0.3 mL | 1.5 | 1500 |
| 35 | 0.35 mL | 1.75 | 1750 |
| 40 | 0.4 mL | 2 | 2000 |
| 45 | 0.45 mL | 2.25 | 2250 |
| 500.5 mL syringe full | 0.5 mL | 2.5 | 2500 |
| 55 | 0.55 mL | 2.75 | 2750 |
| 60 | 0.6 mL | 3 | 3000 |
| 65 | 0.65 mL | 3.25 | 3250 |
| 70 | 0.7 mL | 3.5 | 3500 |
| 75 | 0.75 mL | 3.75 | 3750 |
| 80 | 0.8 mL | 4 | 4000 |
| 85 | 0.85 mL | 4.25 | 4250 |
| 90 | 0.9 mL | 4.5 | 4500 |
| 95 | 0.95 mL | 4.75 | 4750 |
| 100 | 1 mL | 5 | 5000 |
Insulin syringes hold 30, 50, 100 units (0.3, 0.5 and 1 mL). A draw past the top of your syringe needs a larger one, or less water in the vial.
How the chart is worked out
- Concentration = vial amount (mg) divided by the water added (mL). A 10 mg vial in 2 mL is 5 mg/mL.
- One unit on a U-100 insulin syringe is 0.01 mL, so one unit holds the concentration divided by 100. At 5 mg/mL, one unit is 0.05 mg (50 mcg).
- A draw is units times that amount. 20 units at 5 mg/mL is 1 mg; 6 units is 0.3 mg (300 mcg).
The milligram column is rounded to three decimals and the microgram column to the nearest microgram. Every row is computed from the formula, so the last row of a 3 mL chart reads 3.333 mg for a 10 mg vial, not a figure drifted by rounding step by step.
Units, not IU
The units here are the marks on an insulin syringe: at U-100, one hundred of them make 1 mL. They are a volume. They are not international units (IU), which measure the biological activity of a substance and differ from one compound to the next. A peptide labeled in mg has no IU figure on this chart.
Which syringe the rows fit
A 0.3 mL syringe ends at 30 units and a 0.5 mL syringe at 50; the chart marks both rows. If the amount you need sits below those marks, a smaller syringe spreads the same draw over a longer, easier scale. If it sits past the top of yours, the calculator can suggest a water volume that brings the draw back onto the syringe.
Amounts for a specific compound
This chart turns syringe units into milligrams for any vial; it does not say how much of a compound is used. The amounts recorded for each compound, with the sources behind them and a note on how strong the evidence is, are on its page in the compound library. The compound calculators open on those recorded amounts, so the draw for a given vial and water volume can be read straight off.
What the chart does not cover
Vial sizes and water volumes other than these twelve, peptide pens (which dial clicks), nasal sprays, and diluents other than bacteriostatic water. For those, the calculator works from your own numbers, and the unit converter switches between mg, mcg and mL at a known concentration.