Tirzepatide reconstitution calculator
Enter your vial size, how much diluent you added, and the dose your prescriber told you to take. This tool converts those three numbers into a concentration, a draw volume, and a syringe reading — it does not tell you what dose to take.
Tirzepatide reconstitution
Fill in all three fields to see exactly where the plunger lands.
What the FDA-approved product's own label states
Tirzepatide's FDA-approved, brand-name products (Zepbound and Mounjaro) ship as fixed single-dose pens in six strengths: 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, and 15 mg, each in 0.5 mL — read directly off Zepbound's own DailyMed structured product label. That is a description of the branded product's dosage forms, not a recommendation for what a compounded dose should be: compounded tirzepatide is typically sold as a multi-dose vial at a pharmacy-specific concentration, which is exactly the kind of vial-plus-diluent arithmetic the calculator above works out. See our article on compounded tirzepatide's legal status for how a compounded vial differs from the branded pen, regulatorily.
Source: DailyMed structured product label, ZEPBOUND (tirzepatide) injection, solution — Eli Lilly and Company, fetched August 2026. View the label on DailyMed.
Where to go next
- Want the full picture first — what it is, its legal status, and a live board preview, all in one place? See our tirzepatide compound guide.
- See how the providers selling compounded tirzepatide compare on our tirzepatide provider board.
- Read individual provider write-ups on our full reviews index.
- Given a dose in units instead of mg? See why the conversion depends on your vial's concentration.
- Want the FDA label's full titration ladder next to this arithmetic? See the tirzepatide dosage chart.
- Compare true monthly cost across the whole roster on our tirzepatide cost comparison.
- Haven't mixed the vial yet? Read what bacteriostatic water actually is before you reconstitute.
Medical disclaimer: This content is for general educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a licensed healthcare professional before starting, stopping, or changing any treatment.