Semaglutide units calculator
Turn your prescribed semaglutide dose into syringe units at your vial’s strength, and see the Wegovy and Ozempic dosing charts from their FDA labels. Your prescriber sets your dose.
Your pre-mixed vial
Syringe
1 mL · 2-unit marks
From the label, to count the doses in the vial.
Enter your numbers
Enter your numbers
This is arithmetic, not medical advice. Confirm with your prescriber or pharmacist.
How our calculator worksSemaglutide dosing chart (FDA label)
The schedule in the official prescribing information, for reference. Your prescriber sets your dose and when it changes.
Wegovy
semaglutide, once weekly, subcutaneous · Novo Nordisk
| Dose | When (label) |
|---|---|
| 0.25 mg | Weeks 1–4To start treatment only |
| 0.5 mg | Weeks 5–8 |
| 1 mg | Weeks 9–12 |
| 1.7 mg | Weeks 13–16 |
| 2.4 mg | Week 17 onward (maintenance) |
| 7.2 mg | Adults, weight reduction only: after at least 4 weeks on 2.4 mg, if more weight reduction is clinically indicated |
Enter the strength on your vial’s label (mg/mL) in the calculator to add a units column for that strength.
Maximum on the label: 7.2 mg. 7.2 mg (WEGOVY HD) applies only to weight reduction in adults. For every other indication the maximum is 2.4 mg.
The prescriber chooses the maintenance dose based on response and tolerability.
How Wegovy is supplied
Single-dose pen
One dose per pen: 0.5 mL or 0.75 mL per dose.
| Dose | Strength |
|---|---|
| 0.25 mg | 0.5 mg/mL |
| 0.5 mg | 1 mg/mL |
| 1 mg | 2 mg/mL |
| 1.7 mg | 2.27 mg/mL |
| 2.4 mg | 3.2 mg/mL |
Single-dose pen (WEGOVY HD)
One dose per pen: 0.75 mL per dose.
| Dose | Strength |
|---|---|
| 7.2 mg | 9.6 mg/mL |
Multi-dose pen (FlexTouch)
4 doses per pen, 3 mL in total.
| Dose | Strength | Holds |
|---|---|---|
| 2.4 mg | 3.2 mg/mL | 9.6 mg |
Prefilled syringe
One dose per syringe: 0.5 mL or 0.75 mL per dose.
| Dose | Strength |
|---|---|
| 0.25 mg | 0.5 mg/mL |
| 0.5 mg | 1 mg/mL |
| 1 mg | 2 mg/mL |
| 1.7 mg | 2.27 mg/mL |
| 2.4 mg | 3.2 mg/mL |
Units are shown only where the label gives a volume per dose for a vial, since pens and prefilled syringes aren’t measured with an insulin syringe. 100 units = 1 mL.
Source
Label version Jun 18, 2026. Checked against DailyMed; labels change, so the printed insert with your medicine is the final word.
mg to units at your concentration
Units on an insulin syringe measure volume: 100 units is 1 mL. How much semaglutide sits in a unit depends entirely on the strength of your vial, so the same mg can be very different numbers of units on two vials.
units = dose mg ÷ mg/mL × 100
The FDA has received reports of people drawing several times their intended amount after mixing up mL, mg and units with compounded GLP-1 products (FDA). Always work from the mg/mL printed on your own vial, and check the result with your pharmacist.
Wegovy and Ozempic charts
Both labels start at a low dose and increase it in steps of at least 4 weeks, as the chart shows. Wegovy and Ozempic pens deliver doses in mg, so the units column only applies if your semaglutide comes in a vial. Wegovy tablets, Ozempic tablets and Rybelsus are oral products with their own schedules; they aren’t interchangeable mg for mg with the injections.
Reconstituting a semaglutide vial
If your semaglutide comes as a powder, it has to be mixed with the liquid your pharmacy specifies before you can measure it. The vial calculators below take the vial size, the water and your prescribed dose to units. For the steps, see how to reconstitute a vial.
Questions people ask
How do I convert semaglutide units to mg?
Turn the units into mL, then multiply by your vial’s strength: mg = units ÷ 100 × mg/mL. Every unit is 0.01 mL, so 20 units is 0.2 mL; at 2.5 mg/mL that holds 0.5 mg, and at 5 mg/mL it holds 1 mg (numbers for illustration only, not a dose). The strength is on your vial’s label; without it, units can’t be turned into mg.
Can I read the Wegovy or Ozempic dosing chart in units?
No. Wegovy and Ozempic come as pens and prefilled syringes that deliver a set dose in mg; they aren’t measured with an insulin syringe, so units don’t apply. Units only make sense for a vial you draw from, at that vial’s strength. Enter yours in the calculator to see the label’s doses in units.
Why does the FDA warn about semaglutide units?
The FDA has received reports of people drawing several times their intended amount of compounded semaglutide after mixing up mL, mg and units (FDA). Units are a volume: what they hold depends on the vial’s strength. Always work from the mg/mL on your own vial and check with your pharmacist.
How do I reconstitute semaglutide?
FDA-approved semaglutide is never a powder; powder vials sold online as “research” products are unapproved drugs. If your semaglutide is a powder, add the volume of liquid your pharmacy specifies, then use the vial calculator for your size: 5 mg or 10 mg. They show the strength each volume gives and the units for your prescribed dose. Steps: how to reconstitute a vial.
Can Peptinote tell me how many units to take?
No. Peptinote never suggests a dose. Enter the dose your prescriber gave you, and the calculator shows how to measure it: the units, the mL and where the line sits on your syringe, with every step of the math. If you aren’t sure what your dose is, ask your prescriber or pharmacist before drawing anything. How our calculator works.
Semaglutide vial calculators
For vials that come as a powder. Pre-filled with the vial size; you add the water and your prescribed dose.
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Every result is plain arithmetic from formulas we publish in full and check with automated tests. Peptinote doesn’t suggest doses and never sells or links to sellers of peptides.