Retatrutide dosing chart
Every dose from 1 to 12 mg in units, for 10, 20 and 30 mg vials at three water volumes, and the four-week ladder with how many vials it eats.
Retatrutide is an investigational triple agonist, not an approved medicine, and vials sold online are research material. Reported protocols start at 1 or 2 mg once a week and step up every four weeks. This chart converts every step from 1 to 12 mg into insulin syringe units for the common vial sizes and water volumes.
10 mg vial
| Water | Conc. | 1 mg | 2 mg | 3 mg | 4 mg | 5 mg | 6 mg | 8 mg | 10 mg | 12 mg |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 mL | 10 mg/mL | 10 | 20 | 30 | 40 | 50 | 60 | 80 | 100 | - |
| 2 mL | 5 mg/mL | 20 | 40 | 60 | 80 | 100 | 120* | 160* | 200* | - |
| 3 mL | 3.33 mg/mL | 30 | 60 | 90 | 120* | 150* | 180* | 240* | 300* | - |
20 mg vial
| Water | Conc. | 1 mg | 2 mg | 3 mg | 4 mg | 5 mg | 6 mg | 8 mg | 10 mg | 12 mg |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 mL | 20 mg/mL | 5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 |
| 2 mL | 10 mg/mL | 10 | 20 | 30 | 40 | 50 | 60 | 80 | 100 | 120* |
| 3 mL | 6.67 mg/mL | 15 | 30 | 45 | 60 | 75 | 90 | 120* | 150* | 180* |
30 mg vial
| Water | Conc. | 1 mg | 2 mg | 3 mg | 4 mg | 5 mg | 6 mg | 8 mg | 10 mg | 12 mg |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 mL | 30 mg/mL | 3.3 | 6.7 | 10 | 13.3 | 16.7 | 20 | 26.7 | 33.3 | 40 |
| 2 mL | 15 mg/mL | 6.7 | 13.3 | 20 | 26.7 | 33.3 | 40 | 53.3 | 66.7 | 80 |
| 3 mL | 10 mg/mL | 10 | 20 | 30 | 40 | 50 | 60 | 80 | 100 | 120* |
Units on a standard U-100 insulin syringe. * means more than 100 units, so more than one 1 mL syringe. A dash means the dose is larger than the vial.
The reported ladder, with vial counts
| Stage | Weeks | Dose | Units (10 mg in 2 mL) | Vials used so far (10 mg) |
|---|---|---|---|---|
| Stage 1 | weeks 1 to 4 | 2 mg weekly | 40 units | 0.8 |
| Stage 2 | weeks 5 to 8 | 4 mg weekly | 80 units | 2.4 |
| Stage 3 | weeks 9 to 12 | 6 mg weekly | 120 units | 4.8 |
| Stage 4 | weeks 13 to 16 | 8 mg weekly | 160 units | 8 |
| Stage 5 | weeks 17 to 20 | 10 mg weekly | 200 units | 12 |
| Stage 6 | weeks 21 to 24 | 12 mg weekly | 240 units | 16.8 |
Stepping every four weeks from 2 to 12 mg takes 24 weeks and 16.8 vials of 10 mg, most of it in the last two stages. That is the case for buying 20 or 30 mg vials once you are past 6 mg. Many people never go that high; the trials that reported the largest weight loss used 8 and 12 mg, and the right ceiling is a clinical question.
Live version: the retatrutide dosage calculator, and the titration schedule for your own vial and water.
Common questions
- How many units is 2 mg of retatrutide?
- In a 10 mg vial with 2 mL of water, 40 units. With 1 mL, 20 units. In a 20 mg vial with 2 mL, 20 units. The concentration decides it.
- What is the retatrutide dosing schedule?
- Reports describe starting at 1 or 2 mg once a week and stepping up by 2 mg every four weeks, commonly stopping somewhere between 4 and 12 mg. There is no licensed schedule; it is an investigational compound.
- How many vials does a full retatrutide ladder use?
- From 2 to 12 mg in 2 mg steps every four weeks: 168 mg over 24 weeks, which is 16.8 vials of 10 mg, 8.4 of 20 mg or 5.6 of 30 mg.
Every calculator and chart on this site
Weight management (GLP-1 family)
- Retatrutide calculator Vial, water and weekly dose to syringe units
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- Semaglutide calculator The 0.25 to 2.4 mg ladder, converted
- Cagrilintide calculator Amylin analogue, 0.3 to 4.5 mg weekly
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- IGF-1 LR3 calculator Tiny vials, tiny doses
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- MOTS-c calculator 5 to 10 mg, two or three times a week
Repair, skin and blends
- BPC-157 calculator mcg doses from a 5 or 10 mg vial
- TB-500 calculator Loading and maintenance, in units
- BPC-157 / TB-500 blend calculator The Wolverine stack, per component
- GHK-Cu calculator Large vials, mg doses
- GLOW blend calculator The 70 mg blend, split per component
- KLOW blend calculator The 80 mg blend, split per component
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Dosage charts and schedules
- Peptide reconstitution chart Concentration for every vial and water combination
- Peptide dosing chart Printable unit tables for every compound
- Retatrutide titration schedule 2 to 12 mg in units, stage by stage
- Tirzepatide titration schedule 2.5 to 15 mg in units, stage by stage
- Semaglutide titration schedule 0.25 to 2.4 mg in units, stage by stage
- KLOW dosage and frequency chart The 80 mg blend at 2, 3 and 4 mL, both phases
- GLOW dosage chart The 70 mg blend, units to each peptide
- Wolverine stack dosing chart BPC-157 + TB-500, blend and separate vials
- MOTS-c dosage chart 5 and 10 mg vials at three water volumes
- Tirzepatide reconstitution chart Every vial size, every water volume, the whole ladder
- Retatrutide dosing chart (this page)
Tools
- Peptide calculator The general tool, any compound
- Reconstitution calculator How much water to add, and why it matters
- mg to units calculator Both directions, any concentration
- Bacteriostatic water calculator Pick a volume that lands where you can read it
- How to read an insulin syringe U-100 vs U-40, and the 2.5x error
- The Protocol Pack Free 25-page printable reference
- Where to buy Vendor notes and what to check first
- 1 mg to units on an insulin syringe The conversion table for every common concentration
Read this before you use the numbers. This is a unit-conversion tool. It converts a vial strength and a volume of bacteriostatic water into a concentration, a draw volume and a mark on an insulin syringe. It does not tell you what to take, whether to take it, or whether a compound is safe for you. Most of the compounds listed here are sold for laboratory research use and are not approved for human use. Nothing on this site is medical advice. Dosing decisions belong with a licensed clinician who knows your history. Always confirm the strength printed on your own vial rather than trusting a preset.