Retatrutide Dosage Calculator

Retatrutide dosage is a conversion before it is anything else, and this page does that conversion: give it your vial size, the water you added and the dose you want in mg, and it gives you the exact draw in units. Most retatrutide pages argue about amounts instead. Retatrutide vials run big, 5 to 60 mg, which is exactly why the unit numbers confuse people.

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Why retatrutide unit numbers confuse everyone

Two things collide here. The vials are large, so a single vial holds many doses. And the doses are in whole milligrams, not the micrograms most peptides use. So a small change in the water amount moves the draw a lot, and unit numbers copied from someone else's mix can be out by two or three times.

The only number that travels safely between vials is the concentration, in mg per mL. Once you know it, the rest is one division: your dose divided by the concentration is the volume, and the volume times 100 is the units. The calculator does that for you, and the concentration table below shows what each common mix works out to.

Retatrutide dosage chart: 10 mg vial, 2 mL of water

This mix is 5 mg per mL, so every unit holds 0.05 mg. Find your dose, read off the draw.

Dose	Draw in units	Draw in mL
0.5 mg	10 units	0.1 mL
1 mg	20 units	0.2 mL
1.5 mg	30 units	0.3 mL
2 mg	40 units	0.4 mL
2.5 mg	50 units	0.5 mL
3 mg	60 units	0.6 mL
4 mg	80 units	0.8 mL
5 mg	100 units	1 mL

Retatrutide dosage chart: 20 mg vial, 2 mL of water

Same water, double the vial, so the mix is 10 mg per mL and every dose is half the draw of the table above. Put the two side by side and the whole units problem explains itself.

Dose	Draw in units	Draw in mL
1 mg	10 units	0.1 mL
2 mg	20 units	0.2 mL
3 mg	30 units	0.3 mL
4 mg	40 units	0.4 mL
5 mg	50 units	0.5 mL
6 mg	60 units	0.6 mL
8 mg	80 units	0.8 mL
10 mg	100 units	1 mL

Concentration for the common retatrutide mixes

Concentration is vial amount divided by water amount. Everything else on this page is built on these numbers.

Vial	With 1 mL of water	With 2 mL of water	With 3 mL of water
10 mg	10 mg/mL	5 mg/mL	3.33 mg/mL
20 mg	20 mg/mL	10 mg/mL	6.67 mg/mL
30 mg	30 mg/mL	15 mg/mL	10 mg/mL
60 mg	60 mg/mL	30 mg/mL	20 mg/mL

Working with a mix that is not in the tables? The main peptide calculator takes any vial, any water amount and any dose, and the reconstitution calculator works backwards from the draw you want to the water you need.

Common questions

How many units is 2 mg of retatrutide?

It depends entirely on how the vial was mixed. In a 10 mg vial with 2 mL of water (5 mg per mL), 2 mg is 40 units. In a 20 mg vial with 2 mL of water (10 mg per mL), the same 2 mg is 20 units. Same dose, half the draw, because the second mix is twice as strong. The tables above show both.

How much BAC water do I add to a 10 mg retatrutide vial?

That is your choice, and the calculator works with whatever you pick. The common example is 2 mL, which makes a 5 mg per mL mix where every 0.5 mg is a clean 10 units. Add 1 mL instead and the mix is twice as strong, so every dose is half the units. Neither is more correct. It only changes the draw size.

Is there a retatrutide dosage chart?

The two tables on this page are the chart for the most common mixes: a 10 mg vial in 2 mL and a 20 mg vial in 2 mL, dose by dose. For other vial sizes and mixes, the general peptide dosage chart has printable tables and a PDF, and the calculator above covers any combination.

My retatrutide vial is 60 mg. Does this calculator still work?

Yes. The vial presets are just starting points. Type 60 into the vial field, add your water amount, and the maths runs the same way. Retatrutide vials run much bigger than most peptides, from 5 mg up to 60 mg, and the concentration table above includes the 60 mg row.

Why do different websites give different unit numbers for the same retatrutide dose?

Because each one quietly assumes a different mix. A unit number is meaningless until you know the concentration it came from. If a page gives you units without telling you the vial size and water amount behind them, the number cannot be checked, and it will not match your vial unless your mix happens to be the same.

Arithmetic only

This calculator does maths on the numbers you enter. It works out concentration, draw volume and syringe units from the vial amount and water volume you give it. Nothing more.

It does not recommend amounts, schedules or products, and it does not know what is in your vial. It uses the amount printed on the label. If the label and the actual contents differ, the result differs too. For medical questions, talk to a clinician.

How the maths works, and where the facts on this site come from: Methodology and sources.