Semaglutide 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.
What the FDA-approved product's own label states
Semaglutide's FDA-approved weight-management brand, Wegovy, ships as pre-filled single-dose pens and syringes in six strengths — 0.25 mg, 0.5 mg, 1 mg, 1.7 mg, 2.4 mg, and a higher 7.2 mg “Wegovy HD” pen — plus a multi-dose FlexTouch pen delivering four 2.4 mg doses, read directly off Wegovy's own DailyMed structured product label. The same label now also covers Wegovy tablets (1.5 mg, 4 mg, 9 mg, and 25 mg, oral) — a genuinely different, non-injectable product this calculator does not apply to; if your prescription is the pill, there's no vial, diluent, or syringe math to do.
None of the injection strengths above require reconstitution — they ship ready to use. That's a description of the branded pen's fixed dosage forms, not a recommendation for what a compounded dose should be: compounded semaglutide 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. Its legal basis narrowed on a timeline that runs about two months behind tirzepatide's — see our article on compounded semaglutide's legal status for how a compounded vial differs from the branded pen, regulatorily.
Source: DailyMed structured product label, WEGOVY (semaglutide) injection, solution and tablet — Novo Nordisk Pharmaceutical Industries, LP, fetched August 2026. View the label on DailyMed.
Where to go next
- See how the providers selling compounded semaglutide compare on our semaglutide 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.
- Shopping for a dual GIP/GLP-1 agonist instead? Use the tirzepatide reconstitution calculator.
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.