Free · no account
Retatrutide reconstitution calculator
Retatrutide is investigational (trials) — if you're reconstituting a vial, enter the vial mg, the bac water added, and your dose to get the exact units, mL, doses per vial, and cost per dose. Educational only; verify everything with a clinician.
Searching for “GLP-3”? That is not a hormone — it is a nickname for retatrutide, the triple agonist this page calculates for. Here is the full explanation.
Triple agonist (investigational / trials).
"Units" are a volume marking, not a drug amount — the same units = a different mg every time the vial is mixed differently.
Vial size × bacteriostatic water: what each combination gives you
The same vial gives a different concentration depending on how much water you add. Find your vial size and the water you added; the last column is what one milligram is worth in syringe units.
| Vial | Bac water added | Concentration | 1 mg draws |
|---|---|---|---|
| 5 mg | 1 mL | 5 mg/mL | 20 U |
| 5 mg | 2 mL | 2.5 mg/mL | 40 U |
| 5 mg | 3 mL | 1.67 mg/mL | 60 U |
| 10 mg | 1 mL | 10 mg/mL | 10 U |
| 10 mg | 2 mL | 5 mg/mL | 20 U |
| 10 mg | 3 mL | 3.33 mg/mL | 30 U |
| 12 mg | 1 mL | 12 mg/mL | 8.3 U |
| 12 mg | 2 mL | 6 mg/mL | 16.7 U |
| 12 mg | 3 mL | 4 mg/mL | 25 U |
| 24 mg | 1 mL | 24 mg/mL | 4.2 U |
| 24 mg | 2 mL | 12 mg/mL | 8.3 U |
| 24 mg | 3 mL | 8 mg/mL | 12.5 U |
| 60 mg | 1 mL | 60 mg/mL | 1.7 U |
| 60 mg | 2 mL | 30 mg/mL | 3.3 U |
| 60 mg | 3 mL | 20 mg/mL | 5 U |
Units are for a standard U-100 insulin syringe, where 100 units = 1 mL. These are conversions, not dose suggestions — your dose comes from your prescriber, and this page never proposes one. For a size or volume not listed, use the calculator above.
FAQ
How many units is my dose?
Units are a volume marking on the syringe, not a drug amount — on a U-100 syringe, 100 units = 1 mL. The units for any dose depend entirely on how the vial was reconstituted (mg of powder ÷ mL of bacteriostatic water). Enter your numbers above and the calculator gives the exact units.
How much bacteriostatic water should I add?
There's no single right amount — more water makes the solution more dilute (easier to draw, larger volume per dose) and less water makes it more concentrated. Pick a volume, enter it above, and the calculator shows the resulting concentration, units per dose, and doses per vial so you can choose a readable draw.
Other calculators
Keep reading
Sources
This tool converts the numbers you enter — it never recommends a dose. Its constants are cited below; the warnings are arithmetic checks, not clinical limits.
- Syringe "units" are a volume marking, not a drug amount: a U-100 syringe reads 100 units = 1 mL (U-40 = 40 units/mL). The calculator converts mg ↔ mL ↔ units on this standard — it never assumes units equal mg.Standard insulin concentration, U-100 = 100 units/mL (PMC5505430) ↗
- The volume to draw is (drug ordered ÷ drug available) × the vial's total mL — i.e. dose ÷ concentration, where concentration (mg/mL) = vial mg ÷ bacteriostatic water mL. You enter every number; the tool only does this arithmetic.Dose-volume formula — StatPearls "Dose Calculation" (Bookshelf NBK430836) ↗
- An opened (punctured) multi-dose vial is dated and discarded within 28 days unless the manufacturer states otherwise.CDC Injection Safety (per USP General Chapter <797>) ↗
Educational calculator only — not medical advice and not a recommended dose. You enter your own numbers; we only do the arithmetic. Some products are not approved for human use; verify your product and dose with a licensed clinician.
Built by the makers of Glipath — the private GLP-1 companion for iPhone.Privacy ·Terms ·Support