Retatrutide Calculator

Unit conversion only. Retatrutide is an investigational drug; this page does not publish or suggest any dose or titration schedule.

Regulatory status (checked October 2026)

Not FDA-approved. Retatrutide (development code LY3437943, Eli Lilly and Company) has no approval listed in Drugs@FDA.
Phase 3 clinical trials are completed or ongoing in obesity, type 2 diabetes, cardiovascular and kidney outcomes. See the full list on ClinicalTrials.gov.
Expanded access: Lilly lists a "Pre-approval Expanded Access of Retatrutide (LY3437943)" program — NCT07629401. Ask a physician whether it applies to you.
Product listings are not approvals. Some online or database listings use the retatrutide name for products from companies other than the developer. A listing does not mean FDA has reviewed safety, purity or dose.

There is therefore no official retatrutide dosage chart. Doses used inside trials are defined by each protocol for supervised participants.

Unit converter

For use when a clinician or trial team has given you an amount and a vial with stated contents:

Amount in vial

Diluent added (mL)

Amount per injection (from your prescriber)

Syringe

Enter values to see the result.

Formula

Concentration (mg/mL) = vial mg ÷ diluent mL
Volume (mL) = amount ÷ concentration
U-100 units = mL × 100

Arithmetic example only: 10 mg in 2 mL = 5 mg/mL. An entered amount of 1 mg = 0.2 mL = 20 units.

Related: tirzepatide calculator (FDA-approved, label strengths quoted) · mcg to units chart · reconstitution calculator

FAQ

Is retatrutide FDA-approved?

No. As of October 2026 retatrutide (LY3437943, Eli Lilly) has no FDA approval and does not appear in Drugs@FDA. It is being studied in Phase 3 clinical trials, and Lilly lists a pre-approval expanded access program on ClinicalTrials.gov.

Is there an official retatrutide dosage chart?

There is no FDA-approved labeling, so there is no official dosing chart. Doses used inside clinical trials are set by each trial protocol for enrolled participants under medical supervision and are not instructions for anyone else.

What does this retatrutide calculator do?

It only converts numbers you enter — vial mg, diluent mL and an amount — into mL and U-100 syringe units.

Last updated: 2026-10-02 · Found an error? Report it.