Retatrutide dosage calculator
Calculate your retatrutide reconstitution volume, injection dose, and supply duration. Enter your vial size and target weekly dose below.
Reconstituting a 12 mg vial of Retatrutide with 2 mL of bacteriostatic water gives a concentration of 6.00 mg/mL. At that concentration a 1 mg dose is 0.167 mL, which is 16.7 units on a U-100 insulin syringe, and one vial yields 12 doses of that size. Change the vial size, water volume or target dose and the arithmetic changes — the table below covers the common doses, and the calculator handles any combination.
Run your own numbers.
Run the Retatrutide dosage calculator
Enter any vial size, water volume and target dose to get the exact syringe units for Retatrutide. Create a free account to use it — and to save your results, track your protocol, and pick up where you left off on any device.
Everything else on this page — the reference values, the method, and the FAQ — is free and needs no account.
Common doses at a glance.
Every row assumes a 12 mg vial reconstituted with 2 mL of bacteriostatic water, drawn on a U-100 syringe.
| Dose | Volume | Draw to | Doses per vial |
|---|---|---|---|
| 1 mg | 0.167 mL | 16.7 U | 12 |
| 2 mg | 0.333 mL | 33.3 U | 6 |
| 4 mg | 0.667 mL | 66.7 U | 3 |
| 8 mg | 1.333 mL | 133.3 U | 1 |
How the arithmetic works.
- conc = 12 mg ÷ 2 mL = 6.00 mg/mL
- vol = 1mg ÷ 6.00 = 0.167 mL
- units = 0.167 mL × 100 = 16.7 U
A U-100 syringe is graduated so that 100 units equals 1 mL, which is why the volume in millilitres is multiplied by 100 to get the mark to draw to.
This tool does unit arithmetic and nothing else. It does not know your body weight, bloodwork, medication interactions or tolerance, and it does not recommend a dose — the dose you enter is the dose you chose. It assumes a U-100 syringe and full dissolution of the compound, and it cannot account for measurement error, product purity, or a vial that was under-filled. PeptideIQ does not sell, prescribe, or recommend research compounds. Reconstitution math is provided for educational reference. Dosing decisions are between you and a licensed clinician.