Semaglutide Conversion Chart: How to Translate mg Doses to Syringe Units

A semaglutide conversion chart is a reference that translates a prescribed dose in milligrams (mg) into the number of units drawn on an insulin syringe, based on the concentration of the liquid vial. It is used mainly for compounded semaglutide, because FDA-approved Ozempic, Wegovy, and Rybelsus come in fixed-dose pens or tablets that do not require conversion. Always follow the specific instructions from your prescriber or pharmacist, because the concentration printed on your vial is what determines the correct draw.

What a Semaglutide Conversion Chart Actually Does

Semaglutide is dosed in milligrams, not in insulin units. The units printed on a U-100 insulin syringe are simply volume markings: 100 units equal 1 milliliter (mL). A conversion chart bridges the two by showing how many units to draw for a given mg dose at a given vial concentration.

A standard semaglutide chart lists common concentrations in one column and the corresponding unit markings for each dose in the others. If your vial says 5 mg/mL, you need a semaglutide 5mg/ml dosage chart — not a chart built for a 2.5 mg/mL vial. Using the wrong concentration is one of the most common causes of dosing errors with compounded semaglutide.

Most people search for this information because their pharmacy dispensed a vial and syringe instead of a prefilled pen. That switch is exactly where confusion starts: the prescription may say 1 mg, but the syringe only shows units.

How to Convert Semaglutide mg to Units

The core formula is simple, but it only works if you know the exact concentration on your vial label.

Units to draw = (dose in mg ÷ concentration in mg/mL) × 100

Here is a step-by-step example using a 5 mg/mL vial and a 1 mg dose:

1. Divide the dose by the concentration: 1 mg ÷ 5 mg/mL = 0.2 mL.
2. Multiply by 100 to convert mL to units on a U-100 syringe: 0.2 mL × 100 = 20 units.
3. Draw to the 20-unit mark on the syringe.

A 5mg semaglutide dosing chart for that same vial would show 0.25 mg = 5 units, 0.5 mg = 10 units, and 2.4 mg = 48 units. Notice how different the numbers look from a 2.5 mg/mL vial, where 0.25 mg equals 10 units.

If the math gives you a fraction of a unit, do not try to estimate it on the syringe. Ask your pharmacist for a lower-concentration vial or a different measuring device.

Common Concentrations at a Glance

Values assume a U-100 insulin syringe. A 10 mg/mL vial requires drawing 2.5 units for a 0.25 mg dose, which is not accurately measurable on a standard U-100 syringe. That is one reason high-concentration vials can be risky for people who are starting at low doses.

FDA-Approved Semaglutide Doses Do Not Need Conversion

Ozempic, Wegovy, and Rybelsus are FDA-approved and come in fixed doses. There is no mg-to-unit math involved. The table below shows the labeled dose steps for each product.

If you use one of these products, your dose is already measured for you. A semaglutide conversion chart is not needed and should not be used to adjust a prefilled pen or tablet.

Why Compounded Semaglutide Requires Extra Caution

Compounded semaglutide is not FDA-approved for human use in the United States. The FDA has warned about dosing errors, and some compounded products have been found to contain different amounts of semaglutide than the label states.

• Concentrations vary widely: 1 mg/mL, 2.5 mg/mL, 5 mg/mL, 10 mg/mL, and others.
• Some vials include B12 or other additives, which can change the volume.
• Syringe types vary: U-100 is standard, but some pharmacies ship U-40 or other syringes.
• Instructions may be written in mg, mL, or units — sometimes all three.

Because of these variables, a conversion chart is a starting point, not a prescription. Confirm the math with your pharmacist or prescriber before you draw a dose.

Other Peptide Charts and Combinations People Ask About

Search interest often overlaps with other peptides. People researching aod 9604 and semaglutide are usually looking at weight-management stacks, but there is limited human data on using them together, and neither is approved as a combination. Similarly, cagrilintide and semaglutide is an investigational pairing (sometimes called CagriSema) that is not yet approved for weight management in the US.

If you are comparing peptide charts, keep in mind that each peptide has its own dosing units, reconstitution volume, and safety profile. A chart for one peptide does not transfer to another.

Safety Steps Before You Draw a Dose

1. Read the vial label and confirm the concentration in mg/mL.
2. Check that your syringe is U-100 (100 units = 1 mL).
3. Use the formula or a verified chart, not a guess.
4. Have a pharmacist double-check the conversion.
5. Never change your dose without talking to your prescriber.

Semaglutide can cause nausea, vomiting, diarrhea, constipation, and, rarely, more serious issues like pancreatitis or gallbladder problems. Contact a healthcare professional if you have severe or persistent symptoms.

Bottom Line

A semaglutide conversion chart is a math tool for liquid vials, not a dosing recommendation. The only correct conversion is the one that matches your vial's exact concentration and your prescriber's instructions. When in doubt, ask a pharmacist — a two-minute phone call is worth far more than a miscalculated draw.