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.

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.

Retatrutide dosing chart: 1 to 12 mg converted to insulin syringe units at 2.5, 5, 10 and 15 mg/mL — Retatrutide dosing chart. Save or print this one, or download the full-size image. Open the live calculator to use your own numbers.

Live version: the retatrutide dosage calculator, and the titration schedule for your own vial and water.

Peptulator, peptulator.com. Research use only, not medical advice.

The Protocol Pack, free

25 printable pages: dosing cards for the twelve most-used compounds at three water volumes, titration planners, a vial log, and five pages on what to do when it has already gone wrong.

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.

Where to buyWhat to check before you order Vendor scorecardRanked vendors, at Peptide Bureau Build a full protocolThe stack builder at Peptide Bureau, about two minutes

All calculators and charts

Weight management (GLP-1 family)

Retatrutide calculator Vial, water and weekly dose to syringe units
Tirzepatide calculator The 2.5 to 15 mg ladder, converted
Semaglutide calculator The 0.25 to 2.4 mg ladder, converted
Cagrilintide calculator Amylin analogue, 0.3 to 4.5 mg weekly

Growth hormone axis

HGH (somatropin) calculator IU vials to syringe units
Ipamorelin calculator mcg doses, in mL and units
CJC-1295 (no DAC) calculator No-DAC and DAC, mcg to units
CJC-1295 / Ipamorelin blend calculator The 5 mg + 5 mg blend, per component
Sermorelin calculator Nightly mcg doses to units
Tesamorelin calculator 1 to 2 mg daily, in units
Hexarelin calculator mcg doses to units
IGF-1 LR3 calculator Tens of mcg from very small vials
AOD-9604 calculator 300 mcg daily, in units
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 50 to 200 mg vials, mg doses
GLOW blend calculator The 70 mg blend, split per component
KLOW blend calculator The 80 mg blend, split per component

Other compounds

PT-141 calculator 0.5 to 2 mg, as needed
Melanotan II calculator mcg loading doses to units
NAD+ calculator 100 to 1,000 mg vials, 25 to 200 mg doses
Thymosin alpha-1 calculator 1.6 mg twice weekly, in units
Epitalon calculator Short courses of 5 to 10 mg
Kisspeptin-10 calculator mcg doses to units
Glutathione calculator Hundreds of mg, or a 200 mg/mL solution

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)
Printable dosing charts Four one-page charts to save, pin or print

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

Before you use these numbers This is a unit-conversion tool. It turns a vial strength and a water volume into a concentration, a draw volume and a syringe mark. It does not tell you what to take, whether to take it, or whether a compound is safe for you. Most compounds listed are sold for laboratory research and are not approved for human use. Nothing here is medical advice. Dosing decisions belong with a licensed clinician who knows your history. Always check the strength printed on your own vial rather than trusting a preset.