Semaglutide Dosing in Units: Dual-Ladder Chart for Ozempic and Wegovy

Semaglutide Dosing in Units: Dual-Ladder Master Table

Below is the complete lookup: every approved titration step for both Wegovy and Ozempic, with the IU draw at the two standard compounded concentrations. The 2.5 mg/mL setup is a 5 mg vial reconstituted with 2 mL of bacteriostatic water; the 5 mg/mL setup is a 5 mg vial with 1 mL or a 10 mg vial with 2 mL. Every value fits comfortably inside a standard 1 mL U-100 insulin syringe.

Wegovy and Ozempic are the same molecule (semaglutide) with different FDA-approved indications. Both ladders share the first three steps; Wegovy continues two more steps to a 2.4 mg maintenance dose.

"n/a" = the step is not part of that indication's approved titration ladder. All IU values fit inside a standard 1 mL U-100 syringe (100 IU max). The 2.4 mg Wegovy maintenance at 2.5 mg/mL is the largest draw at 96 IU, just below the 100-unit line.

How to Read the Dual-Ladder Table

Two worked examples confirm the math:

• 0.25 mg at 2.5 mg/mL: (0.25 / 2.5) x 100 = 10 IU. Draw to the 10-unit line near the bottom of the barrel. This is the shared starting dose for both Wegovy and Ozempic.
• 2.4 mg at 2.5 mg/mL: (2.4 / 2.5) x 100 = 96 IU. Draw just below the 100-unit line. This is the Wegovy weight-loss maintenance dose.

For any non-standard vial or BAC water volume, the free semaglutide calculator returns the exact draw without manual math, or use the semaglutide dose-to-units calculator to convert a single mg dose to syringe units.

Why Semaglutide Dosing in Units Has Two Different Ladders

Semaglutide is the only GLP-1 in the trilogy with two distinct FDA-approved titration ladders for the same molecule. Ozempic is approved for type 2 diabetes and stops at 1.0 mg as the standard maintenance dose (a 2.0 mg optional step was added by the FDA in 2024 for additional glycemic control). Wegovy is approved for chronic weight management and continues two more steps to a 2.4 mg maintenance dose.

The reason comes down to what each indication is optimised for. HbA1c reduction (the Ozempic outcome) plateaus around 1.0 mg in most patients, so pushing higher delivers diminishing glycemic benefit for the cost of more side effects. The added 2.0 mg step gives clinicians an optional lever for patients who still need more glucose lowering. Weight loss (the Wegovy outcome) continues to scale upward through 2.4 mg in the STEP 1 trial, with patients losing roughly 14.9% of baseline body weight at 68 weeks on the 2.4 mg dose.

Practically, this means a user searching "semaglutide dosing in units" needs to know which indication they are on before reading any number. The 0.5 mg step is identical for both. The 1.0 mg step is maintenance for Ozempic but a midway step for Wegovy. Above 1.0 mg, the two ladders fully separate.

What Concentration Means

The IU marks on a U-100 insulin syringe measure volume, not mass. Each unit represents 0.01 mL of liquid; 100 units fills the standard 1 mL barrel. The marks were designed for insulin, where 1 IU has a fixed mass meaning. Semaglutide is not insulin, so "units" carry no inherent mg value. The same syringe mark holds different mg of semaglutide depending on how concentrated your solution is.

This is why online answers conflict. A clinic using 2.5 mg/mL says "10 units for 0.25 mg." A pharmacy using 5 mg/mL says "5 units for 0.25 mg." Both are correct for their concentration. Neither is correct for yours unless your vial matches.

Common Compounded Semaglutide Concentrations

The two most common compounded setups are 2.5 mg/mL (a 5 mg vial with 2 mL of bacteriostatic water) and 5 mg/mL (a 5 mg vial with 1 mL of BAC water, or a 10 mg vial with 2 mL). A small number of compounders use 2 mg/mL or other custom concentrations. Always check the vial label and confirm the concentration before drawing; if only the total mg and BAC water volume are listed, divide vial mg by water mL to get mg/mL.

Compounded Semaglutide vs Ozempic and Wegovy Pens

Brand-name Ozempic is supplied as a multi-dose pre-filled pen that delivers a dialled mg amount per click; the user selects 0.25, 0.5, 1.0, or 2.0 mg on the dial and the pen handles the volume internally. Brand-name Wegovy is supplied as a single-use autoinjector pre-loaded with one fixed dose per pen (one pen for each step of the ladder). Neither device requires the user to draw a volume or count units.

Compounded semaglutide ships as a dry powder in a multi-use vial. The user adds BAC water, calculates concentration, and draws the required IU for each dose into a U-100 insulin syringe. This is the only situation in which semaglutide unit conversion applies. If you are unsure whether you have a pen, an autoinjector, or a compounded vial, check the label: brand-name product carries the words "Ozempic" or "Wegovy" plus a Novo Nordisk NDC; compounded product lists the compounding pharmacy and a mg amount without a Novo Nordisk label.

Oral Semaglutide (Ozempic Pill, Wegovy Pill, Rybelsus): No IU Calculation Applies

The oral tablet form of semaglutide is taken once daily on an empty stomach and needs no vial, syringe, or IU calculation. As of 2026 the original Rybelsus strengths (3 mg, 7 mg, 14 mg) were reformulated and renamed as the Ozempic pill (1.5 mg, 4 mg, 9 mg) for type 2 diabetes, and a separate Wegovy pill (25 mg) was approved for weight management. Each dose step is held for at least 30 days before titrating up. If you are on Rybelsus, none of the unit math on this page applies; follow the dosing schedule on the bottle label.

Rybelsus and injectable semaglutide share the same molecule but are not interchangeable on a mg-for-mg basis because oral bioavailability is much lower than subcutaneous. A 14 mg oral tablet does not equal a 14 mg injection.

Reverse Lookup: How Many mg Is X Units of Semaglutide?

The inverse question is just as common: someone reads "draw 20 units" on a clinic instruction and wants to know what mg that translates to. The reverse formula is: mg = (IU / 100) x concentration in mg/mL. The table below covers the most-asked unit values at the two standard concentrations.

U-100 syringe marks aligned to semaglutide doses at 2.5 mg/mL: 10 IU (0.25 mg starting), 20 IU (0.5 mg), 40 IU (1.0 mg Ozempic max), 68 IU (1.7 mg), 96 IU (2.4 mg Wegovy maintenance).

Semaglutide Titration Schedule in Units: Week by Week

The FDA-approved titration for semaglutide runs in 4-week steps. The table below combines both Wegovy and Ozempic ladders into a single timeline so compounded-semaglutide users on either indication can find their current week at a glance. IU values reflect the most common 2.5 mg/mL concentration; the 5 mg/mL column halves every value.

Reference schedule only; follow whatever titration your clinic specifies. Many patients hold a step longer for tolerability, and the optional Ozempic 2.0 mg extension is added only when a clinician judges it clinically appropriate.

For a deeper protocol view including timing, fasting context, missed-dose handling, and dose-reduction guidance, see the semaglutide dosing guide. For step-by-step mixing instructions for compounded vials, see the semaglutide reconstitution guide. For the full visual breakdown of both indication ladders, see the semaglutide dosage chart (Ozempic vs Wegovy).

Video: GLP-1 Dose Confusion - mg vs Units Explained for Ozempic

A physician assistant walks through the conceptual difference between mg and syringe units for GLP-1 medications, including Ozempic and other semaglutide products. Short, plain-English, and clinically grounded:

References

1. U.S. Food and Drug Administration. WEGOVY (semaglutide) injection, for subcutaneous use - Prescribing Information. NDA 215256. Novo Nordisk A/S. 2023. accessdata.fda.gov (Wegovy label PDF). (Official FDA prescribing information: confirms the 5-step Wegovy titration 0.25 to 0.5 to 1.0 to 1.7 to 2.4 mg every 4 weeks, once-weekly subcutaneous administration, 2.4 mg maintenance dose for chronic weight management. Note: this is the 2023 revision; the 6/2026 revision adds a 7.2 mg maximum for adults who tolerate 2.4 mg for at least 4 weeks.)
2. U.S. Food and Drug Administration. OZEMPIC (semaglutide) injection, for subcutaneous use - Prescribing Information. NDA 209637. Novo Nordisk A/S. 2023. accessdata.fda.gov (Ozempic label PDF). (Official FDA prescribing information for the T2D indication: confirms the Ozempic titration 0.25 to 0.5 to 1.0 mg standard maintenance, with an optional 2.0 mg extension for additional glycemic control, once-weekly subcutaneous administration.)
3. Wilding JPH, Batterham RL, Calanna S, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. New England Journal of Medicine. 2021;384(11):989-1002. DOI: 10.1056/NEJMoa2032183. (STEP 1 anchor trial: 14.9% mean body-weight reduction at 2.4 mg over 68 weeks, validating the Wegovy maintenance dose as the clinically meaningful weight-loss target.)
4. U.S. Food and Drug Administration. RYBELSUS (semaglutide) tablets - Prescribing Information. NDA 213051. Novo Nordisk A/S. 2023. accessdata.fda.gov (Rybelsus label PDF). (Official FDA prescribing information for oral semaglutide: confirms the 3 to 7 to 14 mg daily titration, oral tablet form factor, and explicit non-applicability of IU calculations to the oral form.)
5. U.S. Food and Drug Administration. Insulin Syringes - Home Use Devices. FDA.gov. Accessed 2026-05-26. fda.gov/medical-devices/home-use-devices/insulin-syringes. (FDA reference confirming the U-100 standard: 100 IU equals 1 mL, the basis for every IU value on this page.)
6. BD Diabetes Care. Insulin Syringes - Product Information for U-100 Syringes. bd.com/en-us/products/diabetes/diabetes-products/insulin-syringes. (Manufacturer reference for U-100 insulin syringe calibration: 100 IU equals 1 mL, with 1-unit graduation marks across the 100-unit range used to read every IU draw on this page.)

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