Units depend on your vial’s concentration, not on semaglutide. On a U-100 syringe, 1 unit = 0.01 mL.
units = dose (mg) ÷ concentration (mg per mL) × 100
Arithmetic example: at 2.5 mg per mL, 0.25 mg is 0.1 mL = 10 units; at 10 mg per mL the same 10 units hold 1 mg, four times as much. That is why a unit count from a forum or a different pharmacy means nothing without the concentration.
Brand Wegovy comes in single-dose pens and prefilled syringes that state each dose in mg and mL (for example 0.25 mg/0.5 mL). Units only come up with compounded multi-dose vials, which FDA has not approved, so the number of units depends entirely on the concentration printed on that vial.
Mixing a vial yourself? Use the reconstitution calculator. Want the half-life picture? See the relative-level chart.
About this tool
- It does math on numbers you type. It never suggests a dose, a substance, a schedule or a source.
- Nothing you type is sent anywhere. The math runs in your browser. A share link keeps your numbers after the # sign, which browsers do not send to any server, and nothing is saved.
- SoftMaxx AI sells no peptides and takes no vendor money. No links on this page earn us anything.
- For adults 18+. Not medical advice. Your prescriber sets your dose; your pharmacist can check your math.
- Report side effects to FDA MedWatch (US) or Canada Vigilance (Canada). FDA’s page on unapproved GLP-1 drugs explains its multi-dose vial and dosing concerns.
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