Retatrutide Dosage Calculator
Retatrutide is an experimental once-weekly "triple agonist" being studied for weight loss. If you have a reconstituted vial, this calculator converts your prescribed dose into syringe units.
- Common vials
- 5 mg · 10 mg · 20 mg
- Dosing frequency
- Once weekly (in trials)
Investigational — not FDA-approved and still in clinical trials.
Step 1
Your vial & dose
Step 2
Step 3
Syringe size
Smaller barrels have finer marks, which makes small doses easier to read.
Live syringe preview · 100-unit
Draw to
20 units
= 0.2 mL of liquid
- Concentration
- 5 mg/mL
- Each unit contains
- 50 mcg
- Your dose
- 1 mg
- Doses per vial
- 10
Show the math
- Concentration = 10 mg ÷ 2 mL = 5 mg/mL
- Volume = 1 mg ÷ 5 mg/mL = 0.2 mL
- Units = 0.2 mL × 100 = 20 units
Dosing schedule
Is there a standard Retatrutide dose?
There is no approved dosing schedule for retatrutide. Doses in trials were set by study protocols under medical supervision — don’t copy them on your own.
How to mix
How to reconstitute a peptide vial in 5 steps
- 01
Clean
Wash your hands. Wipe the rubber tops of the peptide vial and the bacteriostatic water with an alcohol swab and let them air-dry.
- 02
Draw the water
With a new syringe, draw 2 mL of bacteriostatic water — the same number you entered in the calculator. Use several draws if it’s more than your syringe holds.
- 03
Add it slowly
Insert the needle at an angle and let the water run down the inside wall of the vial, not straight onto the powder.
- 04
Swirl, don’t shake
Gently swirl or roll the vial until the powder dissolves completely. The liquid should look clear.
- 05
Label & refrigerate
Write the date and concentration (5 mg/mL) on the vial and keep it in the fridge.
Storing a mixed vial
- Keep it refrigerated at 2–8 °C (36–46 °F). Don’t freeze it.
- Protect it from light and heat.
- Follow the beyond-use date on your pharmacy label. If the liquid turns cloudy or has particles, don’t use it.
Please read before injecting
Always confirm your dose, concentration and syringe markings with your prescriber or pharmacist. Small calculation errors can have serious consequences. This tool does math — it doesn’t tell you what dose to take.
Sources
References
Last updated October 2026. Example vial: 10 mg + 2 mL = 5 mg/mL.
Related
Other calculators
Tirzepatide
GIP / GLP-1 receptor agonist
Common vials: 5 mg, 10 mg, 15 mg, 20 mg, 30 mg
Open calculator
FDA-approved (brand)Semaglutide
GLP-1 receptor agonist
Common vials: 2 mg, 5 mg, 10 mg
Open calculator
FDA-approved (brand)Tesamorelin
Growth hormone–releasing hormone analog
Common vials: 2 mg, 5 mg, 10 mg
Open calculator