Retatrutide reconstitution calculator
Concentration, draw volume and U-100 units for retatrutide vials from 5 to 60 mg.
Retatrutide vials are sold in a wide spread of sizes, from 5 mg up to 60 mg, and the same amount can read very differently on a syringe depending on the vial and the water added. Two milligrams from a 10 mg vial with 2 mL of water is 40 units; the same 2 mg from a 60 mg vial with 3 mL is 10 units.
The calculator converts a vial size, a diluent volume and an amount in mg or mcg into the concentration, the volume in mL and the U-100 syringe reading. The chart further down lists the same numbers for the vial and water combinations that appear most often.
Retatrutide calculator
- Concentration
- 5.00 mg/mL
- 5,000 mcg/mL
- Volume
- 0.100 mL
- Amount
- 500 mcg
- Amounts per vial
- 20
- 20 whole
Results are arithmetic from the three numbers entered. U-100 scale: 100 units = 1 mL. Presets are figures reported in published and community sources, offered as shortcuts, not recommendations. The vial label is the number to trust.
Setups entered by researchers
Not enough Retatrutide calculations have been logged yet to publish a breakdown. A peptide's setups appear here once it passes 100 calculations and a setup has been entered at least 30 times. How the setup data works.
Retatrutide reconstitution chart
U-100 readings (u) and volumes for each vial size and water volume. Columns are amounts that appear in published and community sources, listed for comparison only.
5 mg vial
| Water | Concentration | 500 mcg | 1 mg | 2 mg |
|---|---|---|---|---|
| 1 mL | 5,000 mcg/mL | 10 u0.1 mL | 20 u0.2 mL | 40 u0.4 mL |
| 2 mL | 2,500 mcg/mL | 20 u0.2 mL | 40 u0.4 mL | 80 u0.8 mL |
| 2.5 mL | 2,000 mcg/mL | 25 u0.25 mL | 50 u0.5 mL | 100 u1 mL |
10 mg vial
| Water | Concentration | 500 mcg | 1 mg | 2 mg | 4 mg |
|---|---|---|---|---|---|
| 1 mL | 10 mg/mL | 5 u0.05 mL | 10 u0.1 mL | 20 u0.2 mL | 40 u0.4 mL |
| 2 mL | 5,000 mcg/mL | 10 u0.1 mL | 20 u0.2 mL | 40 u0.4 mL | 80 u0.8 mL |
| 2.5 mL | 4,000 mcg/mL | 12.5 u0.125 mL | 25 u0.25 mL | 50 u0.5 mL | 100 u1 mL |
20 mg vial
| Water | Concentration | 1 mg | 2 mg | 4 mg | 8 mg |
|---|---|---|---|---|---|
| 2 mL | 10 mg/mL | 10 u0.1 mL | 20 u0.2 mL | 40 u0.4 mL | 80 u0.8 mL |
| 3 mL | 6,667 mcg/mL | 15 u0.15 mL | 30 u0.3 mL | 60 u0.6 mL | 120 u1.2 mLover 1 mL |
| 4 mL | 5,000 mcg/mL | 20 u0.2 mL | 40 u0.4 mL | 80 u0.8 mL | 160 u1.6 mLover 1 mL |
30 mg vial
| Water | Concentration | 1 mg | 2 mg | 4 mg | 8 mg |
|---|---|---|---|---|---|
| 1.5 mL | 20 mg/mL | 5 u0.05 mL | 10 u0.1 mL | 20 u0.2 mL | 40 u0.4 mL |
| 2 mL | 15 mg/mL | 6.67 u0.0667 mL | 13.33 u0.1333 mL | 26.67 u0.2667 mL | 53.33 u0.5333 mL |
| 3 mL | 10 mg/mL | 10 u0.1 mL | 20 u0.2 mL | 40 u0.4 mL | 80 u0.8 mL |
60 mg vial
| Water | Concentration | 2 mg | 4 mg | 8 mg | 12 mg |
|---|---|---|---|---|---|
| 1.5 mL | 40 mg/mL | 5 u0.05 mL | 10 u0.1 mL | 20 u0.2 mL | 30 u0.3 mL |
| 2 mL | 30 mg/mL | 6.67 u0.0667 mL | 13.33 u0.1333 mL | 26.67 u0.2667 mL | 40 u0.4 mL |
| 3 mL | 20 mg/mL | 10 u0.1 mL | 20 u0.2 mL | 40 u0.4 mL | 60 u0.6 mL |
How the Retatrutide numbers are worked out
Concentration is the vial mass divided by the water added: a 10 mg vial with 2 mL is 5.00 mg/mL, a 30 mg vial with 3 mL is 10.00 mg/mL.
The volume for an amount is the amount divided by the concentration. On a U-100 syringe 1 mL is 100 units, so 1 mg from a 10 mg vial at 2 mL is 20 units (0.2 mL).
Larger vials reconstituted with the same water are more concentrated, so the same amount takes up fewer units. That makes small amounts harder to read on the syringe scale, which is why the chart shows several water volumes per vial.
Retatrutide calculator questions
How many units is 1 mg of retatrutide from a 10 mg vial with 2 mL of water?
A 10 mg vial with 2 mL is 5.00 mg/mL, so 1 mg is 20 units (0.2 mL) on a U-100 syringe. The vial holds 10 amounts of 1 mg.
How many units is 2 mg from a 20 mg retatrutide vial?
With 2 mL of water a 20 mg vial is 10.00 mg/mL, and 2 mg is 20 units (0.2 mL). With 3 mL it is 30 units (0.3 mL).
How is a 30 mg or 60 mg vial calculated?
The same way as any other size: divide the vial mass by the water to get mg/mL. A 30 mg vial with 3 mL is 10.00 mg/mL, so 4 mg is 40 units (0.4 mL). A 60 mg vial with 3 mL is 20.00 mg/mL, so 4 mg is 20 units (0.2 mL).
Does the amount of water change how much retatrutide is in the vial?
No. The water only sets the concentration. The vial holds the same total mass whether 1 mL or 4 mL is added; more water means each mg occupies more volume and more units.
What amounts do published and community sources report?
Phase 2 and phase 3 trials have used once-weekly amounts that were stepped up over time, and community sources describe a range of starting and later amounts. The presets in the calculator (0.5 to 8 mg) are figures drawn from those reports, included to save typing. They are not a recommendation, and none of them is presented here as a standard dose.
Why does the calculator flag amounts over 100 units?
A 1 mL U-100 syringe holds 100 units. When the calculated volume is larger than the syringe selected, the reading cannot be taken in one fill, so the calculator says so. A smaller syringe (0.3 or 0.5 mL) reaches its limit sooner, at 30 or 50 units.