Semaglutide calculator
A GLP-1 receptor agonist prescribed for type 2 diabetes and chronic weight management, dosed once weekly.
Also known as: Ozempic, Wegovy, Rybelsus
FDA status FDA-approved as a prescription drug (Ozempic, Wegovy, Rybelsus). Compounded semaglutide is not FDA-approved and is not reviewed by FDA for safety, effectiveness, or quality.
Calculate your draw
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A worked example
A 5 mg vial reconstituted with 2 mL of bacteriostatic water gives 2.5 mg/mL. A 250 mcg dose is then 0.1 mL — about 10 units on a 100-unit insulin syringe, giving roughly 20 doses per vial before accounting for residual volume left in the vial and syringe.
Prefer paper? Download the printable Semaglutide dosing chart (PDF) — every vial size and water volume in syringe units, with the same review byline as this page. All charts →
Commonly cited dose range
Figures circulating for Semaglutide run from 250 mcg to 2400 mcg. Commonly discussed protocols start low and titrate over several weeks. Weekly dosing.
Read this as reference information, not instruction. These numbers describe what is commonly discussed, not what is right for any individual. Dose, frequency, and whether to use Semaglutide at all are decisions for a licensed clinician who knows your history.
Common questions
How much bacteriostatic water should I add to a 5 mg semaglutide vial?
There is no single correct volume — the water only sets the concentration, not the dose. 2 mL in a 5 mg vial gives 2.5 mg/mL, so a 250 mcg dose is 10 units on a standard 100-unit insulin syringe. Adding more water makes each dose a larger, easier-to-measure draw.
Does adding more water make the dose weaker?
No. More water lowers the concentration, so you draw a larger volume for the same amount of peptide. The milligrams delivered are unchanged as long as you recalculate the draw.
How long does reconstituted semaglutide last?
Storage and beyond-use dating depend on the specific product and preparation. Follow the instructions supplied with your prescription and ask the prescribing clinician or pharmacist — do not rely on general internet guidance.