Retatrutide Dosage Calculator
Compute exact retatrutide titration doses in insulin units.
Open the calculator
Pre-filled with Retatrutide defaults — adjust vial size, water volume, and dose to your protocol.
About the Retatrutide Dosage Calculator
Retatrutide is a triple-agonist research peptide most often supplied in 5 mg, 10 mg, 15 mg, 20 mg, or 30 mg vials. Reported research titration steps commonly begin at 2 mg weekly and step up through 4 mg, 8 mg, and 12 mg, so the choice of reconstitution volume determines how readable each dose is on an insulin syringe.
Enter your vial size, bacteriostatic water volume, and target dose — the calculator returns the mg/mL concentration, the exact mL to draw, and the equivalent U-100 insulin units. Save reconstitutions to your account to track vial usage and remaining doses over time.
Example: a 20 mg retatrutide vial reconstituted with 2 mL of bacteriostatic water yields 10 mg/mL. A 2 mg dose is 0.2 mL (20 units), a 4 mg dose is 0.4 mL (40 units), and an 8 mg dose is 0.8 mL (80 units).
Quick reference
- Typical vial sizes
- 5 mg · 10 mg · 15 mg · 20 mg · 30 mg
- Typical research dose range
- 2 mg to 12 mg weekly (titrated)
How to prepare Retatrutide
- Draw the intended volume of bacteriostatic water into a sterile syringe.
- Slowly inject the water down the inside wall of the retatrutide vial — never directly onto the lyophilized powder.
- Gently swirl (do not shake) until the powder is fully dissolved and the solution is clear.
- Store the reconstituted vial refrigerated at 2–8°C and use within the peptide's stability window.
- Use the concentration and dose volume calculated above to draw each research dose into an insulin syringe.
Frequently asked questions
How do I reconstitute retatrutide?
Add bacteriostatic water to the retatrutide vial using the volume the calculator recommends for your desired concentration. Slowly inject the water down the side of the vial, swirl gently, and store the vial refrigerated.
What bacteriostatic water volume should I use for retatrutide?
Common choices are 1 mL, 2 mL, or 3 mL of bacteriostatic water. The right volume depends on your vial strength and target dose — use the calculator above to get a concentration that lets you draw your dose in whole insulin units.
What is a typical research dose range for retatrutide?
Reported research dose ranges for retatrutide are 2 mg to 12 mg weekly, titrated slowly. Always verify against current literature — this tool is for research reference only, not medical advice.
How long is retatrutide stable after reconstitution?
Once reconstituted with bacteriostatic water and stored refrigerated (2–8°C), most peptides remain stable for roughly 28–30 days. Check the specific stability data for retatrutide for your batch.
Can I use this retatrutide calculator with any insulin syringe?
Yes. The calculator supports U-100 syringes in 30, 50, and 100-unit capacities and shows both the mL dose volume and the equivalent insulin units for whichever syringe you choose.
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