Retatrutide Reconstitution Calculator
Enter your vial size, your dose in mg, and your syringe. You get how much bacteriostatic water to add, the exact units to draw, and how many doses the vial holds.
Retatrutide is investigational and not FDA-approved. This calculator only does the mixing math; it doesn't suggest a dose.
Step 1 · Vial strength
This is printed on your vial or the product listing. Common amounts are 2mg, 5mg, and 10mg.
How it works
- Enter your vial strength: the mg printed on the vial.
- Enter your dose per injection in mg.
- Pick your syringe: 100-unit (1 mL) or 30-unit (0.3 mL).
- Read how much BAC water to add, how many units to draw, and how many doses the vial holds.
Frequently asked questions
How much BAC water for 10 mg of retatrutide?
It sets the concentration, so it depends on how you want your doses to measure. 1 mL makes 10 mg/mL, where each unit on a U-100 syringe is 0.1 mg. 2 mL makes 5 mg/mL, where each unit is 0.05 mg. More water spreads a dose over more units, which is easier to measure precisely.
How many units is 1 mg of retatrutide?
At 10 mg/mL, 1 mg is 10 units. At 5 mg/mL, 1 mg is 20 units. Units = mg divided by concentration (mg/mL), times 100.
How long does reconstituted retatrutide last?
There's no published stability data for reconstituted retatrutide outside of clinical trials. Most people follow the general practice for reconstituted peptides: refrigerate at 2 to 8°C, keep it out of light, and use it within 14 to 28 days.
Track your protocol in DoneDose
DoneDose logs your doses, tracks serum levels over time, and reminds you when to inject next.
Related calculators & guides
This calculator is for informational purposes. Consult your prescribing provider for medical advice specific to your protocol. DoneDose does not provide medical advice.