Retatrutide Reconstitution & Dosage Calculator

Retatrutide vials vary by supplier and label amount. Enter the exact amount printed on your vial — not an example — along with the bacteriostatic water you added and the dose you already have, to get a concentration and syringe draw. This free tool doubles as a Retatrutide dosage calculator — reconstitution and dosage are just two steps of the same math.

Retatrutide vials are commonly sold in 5 mg, 10 mg, 15 mg, and 30 mg sizes. Enter your vial's actual labeled amount, not one of these examples.

Peptide amount in vial

The total peptide mass printed on your vial label.

mgmcg

Bacteriostatic water added

How much water you added to reconstitute the vial.

Desired dose

The dose you already have — this tool converts it, it doesn't choose it for you.

mgmcg

Syringe size (U-100)

0.3 mL0.5 mL1.0 mL

Results

Syringe draw

—u

Enter your dose above

Concentration (mg/mL): —
Concentration (mcg/mL): —
Injection volume: Enter your dose above
mcg per unit: —
Doses per vial: —

Formula: dose ÷ concentration × 100 — see methodologyFormulas verified: July 23, 2026No data leaves your browser

Arithmetic only — this tool does not recommend a dose.

How this calculator works

Concentration = peptide amount ÷ bacteriostatic water volume.
Injection volume = your dose ÷ that concentration.
Syringe units = injection volume × 100, since a U-100 syringe holds 100 units per mL.

Retatrutide peptide dosage chart

This chart converts between units only — it is not a recommended dose for any compound. Your prescribed or protocol dose comes from your own paperwork, not this chart.

mg to mcg
mg	mcg
0.1 mg	100 mcg
0.25 mg	250 mcg
0.5 mg	500 mcg
1 mg	1,000 mcg
2 mg	2,000 mcg
5 mg	5,000 mcg
10 mg	10,000 mcg

mL to U-100 syringe units
mL	Units
0.05 mL	5 units
0.1 mL	10 units
0.2 mL	20 units
0.25 mL	25 units
0.5 mL	50 units
0.75 mL	75 units
1.0 mL	100 units

How much bacteriostatic water for Retatrutide?

There's no fixed water amount for Retatrutide — the volume you choose sets your vial's concentration, not a rule the compound follows. Add less and the same labeled mass becomes more concentrated, shrinking the draw for any dose; add more and it's more dilute, growing the draw. Enter your Retatrutide vial's mg and chosen water volume above to see which you get.

Retatrutide units calculator

A U-100 syringe barrel is printed with unit lines, 100 to a milliliter, and that's the scale your Retatrutide draw needs to match. This calculator turns the injection volume from your Retatrutide concentration and dose into that same unit count, so you're reading a Retatrutide draw off printed lines rather than judging a fraction of a milliliter by eye.

How much bac water for 10 mg Retatrutide?

A 10 mg Retatrutide vial doesn't have one correct water amount — whatever volume you add sets the concentration for every dose after that. Adding 1 mL gives a 10 mg/mL concentration; 2 mL gives 5 mg/mL; 3 mL gives about 3.33 mg/mL — the same 10 mg spread thinner as the water volume grows. Enter 10 as your vial amount above and try a few water volumes to see the concentration and syringe draw each one produces for your dose.

Frequently asked questions

Is this a free Retatrutide peptide calculator?

Yes. It runs entirely in your browser, with no account, no login, and no data sent anywhere — enter your vial amount, water volume, and dose to get a concentration and syringe draw.

Is this just a Retatrutide calculator, or does it also do dosing?

Both — "Retatrutide calculator" covers this page's full range. It works out your vial's concentration from the amount and water you enter, and once you add a dose, it converts that into an injection volume and syringe unit count in the same step.

Is this a Retatrutide dosage calculator?

Yes. Reconstitution and dosage are two steps of the same calculation: this tool first works out your Retatrutide vial's concentration from its amount and water volume, then — once you enter a dose — converts that dose into an injection volume and syringe unit count.

What size are Retatrutide vials?

Retatrutide vials are commonly sold in 5 mg, 10 mg, 15 mg, and 30 mg sizes, but always use the exact amount printed on your own vial's label rather than one of these examples — label amounts vary by supplier, and the calculator works identically for any amount you enter.

Is there a Retatrutide peptide dosage chart?

See the mg/mcg and mL/units conversion chart below. It converts between units only — it does not list a recommended Retatrutide dose, which should come from your own prescription or protocol.

Does Retatrutide dosage use mg or mcg?

Both units appear on different suppliers' labels and protocols. 1 mg = 1,000 mcg. The calculator above has an mg/mcg toggle for both the vial amount and the dose field — match whichever unit is printed on your paperwork.

Is this a Retatrutide reconstitution calculator for weight loss?

This calculator handles the arithmetic for Retatrutide, a compound studied in weight-management research — concentration from your vial's amount and water volume, then a dose into a syringe draw. It doesn't recommend a dose, a protocol, or a use case; it converts whatever numbers you already have.

How do I reconstitute Retatrutide?

Add a known volume of bacteriostatic water to your Retatrutide vial, then divide the peptide amount on the label by that water volume to get the concentration in mg/mL. Enter both numbers above — the calculator does that division for you and, once you add a dose, converts it into an injection volume and syringe unit count.

What is my Retatrutide dose in mL?

Divide your dose by your vial's concentration (peptide amount ÷ water volume) to get the injection volume in mL. Enter your Retatrutide vial's amount, the water you added, and your dose above, and the calculator returns that volume directly, along with the equivalent unit count on a U-100 syringe.

Is this calculator affiliated with a specific Retatrutide brand or supplier?

No. This calculator is not affiliated with any peptide manufacturer or supplier — it performs the same arithmetic conversion regardless of where your vial came from.

Is this Retatrutide calculator medical advice?

No. It applies one formula — mass divided by volume, then dose divided by concentration — to the numbers you enter. It does not suggest a dose, a vial size, or a solution volume. See the medical disclaimer for full detail.

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Educational tool only, not medical advice — verify with a licensed clinician. See the full medical disclaimer.