Interactive tool · Unit converter
How many units is my semaglutide dose?
Compounded semaglutide ships as a multi-dose vial measured in milligrams, but an insulin syringe is marked in units. This tool does the conversion both ways from the two numbers that define your vial — its total strength and the bacteriostatic water added — so you can see exactly which mark a given dose lands on. It is a math converter, not a dose recommendation.
Read before you use this
This is an educational arithmetic converter, not medical advice and not a dosing recommendation. It does not tell you what dose to take — it only converts numbers you enter between milligrams and U-100 syringe units. It applies only to compounded multi-dose vials drawn with an insulin syringe under a prescriber's direction; brand-name Wegovy and Ozempic are fixed-dose pens — you dial the dose and there are no "units" to compute. Compounded products vary in strength and quality, and a math slip in self-injected medication can be dangerous. Always confirm your vial strength, the exact water volume, your prescribed dose, and your syringe type with the prescriber and pharmacy who supplied them before drawing or injecting anything.
Draw to this mark
5units
on a U-100 insulin syringe
0.05 mL
volume drawn
Math only — this is not a dose recommendation. Compounded vials vary; confirm your vial strength, water volume, and the exact dose your prescriber set before drawing anything.
How it is calculated. Reconstituting a vial fixes its concentration = total mg ÷ mL of bacteriostatic water. A U-100 insulin syringe reads 100 units per 1 mL, so units = (dose mg ÷ concentration) × 100, and reversing it, dose mg = (units ÷ 100) × concentration. Worked example: 5 mg vial + 1 mL water = 5 mg/mL; a 0.25 mg dose = 0.05 mL = 5 units.
Where to actually get it · affiliate partners
Where compounded vials come from
Unit math only helps if you already have a vial. These are the telehealth programs we partner with, each with a clinician reviewing an online intake first.
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CoreAge Rx
Doctor-reviewed semaglutide with one flat price and built-in human support.
$99/mo flat
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Found
The established, full-service pick — obesity-medicine clinicians and the broadest medication menu we log, from compounded to real brand-name and oral semaglutide.
Compounded from $99/mo · brand +$39/mo
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Sesame Care
Established national telehealth marketplace with the widest real brand-name GLP-1 access — Wegovy pen and pill, Zepbound, Ozempic, Mounjaro — and pick-your-provider pricing.
Wegovy pill from $149/mo + platform sub
See how the whole field compares
Advertising disclosure. We may earn a commission if you start care through these links, at no extra cost to you. Full disclosure.
Read next
Compounding, injection technique, and how the legal landscape sits in 2026 are the parts worth understanding before you ever pick up a syringe:
This converter is informational and not medical advice. It performs fixed arithmetic (concentration = mg ÷ mL; units = dose mg ÷ concentration × 100) on values you enter and makes no recommendation about whether, or how much, semaglutide is appropriate for you. Semaglutide is available by prescription after clinician review. Compounded vials are not FDA-approved finished products and vary by pharmacy; verify every number with your prescriber and pharmacy before drawing or injecting.