Semaglutide 5mg/mL Dosage Chart: Milligrams to Units Explained

At a concentration of 5 mg/mL, semaglutide doses are drawn in very small volumes: 0.25 mg equals 0.05 mL (5 units on a U-100 syringe), 0.5 mg equals 0.10 mL (10 units), and 1 mg equals 0.20 mL (20 units). The chart below converts the standard titration steps from 0.25 mg through 2.4 mg into milliliters and syringe units. Always confirm your own dose, concentration, and syringe type with your prescriber or pharmacist before injecting, because the same milligram dose draws differently at other concentrations.

Semaglutide 5 mg/mL Dosage Chart

This table turns common semaglutide doses into volume and units at 5 mg/mL. It is a conversion reference for people already prescribed this concentration, not a recommendation to start or change a dose.

Dose (mg)	Volume at 5 mg/mL (mL)	Units on a U-100 syringe	Typical role in titration
0.25 mg	0.05 mL	5 units	Starting dose (weeks 1–4)
0.5 mg	0.10 mL	10 units	Second step
1.0 mg	0.20 mL	20 units	Third step
1.7 mg	0.34 mL	34 units	Wegovy titration step
2.0 mg	0.40 mL	40 units	Maximum Ozempic dose
2.4 mg	0.48 mL	48 units	Maximum Wegovy dose

All unit values assume a U-100 insulin syringe, where 100 units equals 1 mL. A U-40 or U-50 syringe would show different unit numbers for the exact same milliliter volume.

What 5 mg/mL Actually Means

Semaglutide 5 mg/mL describes concentration, not dose. Concentration tells you how much drug is dissolved in each milliliter of liquid, so a 3 mL vial at this strength contains 15 mg of semaglutide in total.

Dose is measured in milligrams and comes from a prescription. Volume is the amount of liquid that delivers that dose, and it is calculated by dividing the dose by the concentration.

• Concentration: 5 mg per 1 mL
• Dose: 0.5 mg once weekly, for example
• Volume: 0.5 mg ÷ 5 mg/mL = 0.1 mL, or 10 units

Brand-name semaglutide products such as Ozempic and Wegovy are dosed in milligrams and use prefilled pens rather than mg/mL vials. Compounded semaglutide is not FDA-approved for human use, and the FDA has warned about unapproved compounded GLP-1 products sold online.

How to Read the Chart With a U-100 Syringe

1. Find the milligram dose your prescriber ordered in the first column.
2. Read across to the volume in milliliters and then to the units.
3. Draw the plunger to that unit mark, not to the milliliter mark, if your syringe is marked in units.
4. Check for air bubbles, tap them out, and confirm the dose with a second person or your pharmacist when possible.

People often look up a 5mg semaglutide dosing chart after switching pharmacies, because a new concentration can change the number of units for the same milligram dose. A semaglutide chart is only accurate when the concentration printed on the chart matches the concentration printed on your vial.

Why Concentration Changes the Units

Two vials can hold the same dose in very different volumes of liquid. A stronger concentration means less liquid per dose, which means fewer units on the syringe.

Concentration	Volume for a 1 mg dose	Units on a U-100 syringe	Example vial size
2.5 mg/mL	0.40 mL	40 units	2.5 mg/mL, 2 mL
5 mg/mL	0.20 mL	20 units	5 mg/mL, 3 mL
10 mg/mL	0.10 mL	10 units	10 mg/mL, 2 mL

Searches for semaglutide 2.5mg usually trace back to tirzepatide, not semaglutide. Tirzepatide titration starts at 2.5 mg, while semaglutide titration typically begins at 0.25 mg and steps through 0.5 mg, 1 mg, 1.7 mg, and 2.4 mg.

If Your Dose Isn't on the Chart

Some prescriptions fall between the standard steps, such as 0.75 mg or 1.25 mg. You can find the volume by dividing the dose by 5 mg/mL and then multiplying the result by 100 to get units.

• 0.75 mg ÷ 5 mg/mL = 0.15 mL, or 15 units
• 1.25 mg ÷ 5 mg/mL = 0.25 mL, or 25 units
• 1.5 mg ÷ 5 mg/mL = 0.30 mL, or 30 units

Non-standard doses should come from your prescriber, not from an online calculator. Ask the prescribing clinician or pharmacist to confirm the math before you draw up anything.

Titration: Why Doses Step Up Slowly

Semaglutide is usually started low and increased roughly every four weeks. The slow ramp gives the body time to adjust and helps limit nausea, vomiting, constipation, and other gastrointestinal side effects.

• Weeks 1–4: 0.25 mg (5 units at 5 mg/mL)
• Weeks 5–8: 0.5 mg (10 units)
• Weeks 9–12: 1 mg (20 units)
• Week 13 and beyond: 1.7 mg or 2.4 mg if tolerated and prescribed

These timelines reflect general brand-label titration schedules rather than personal medical advice. A prescriber may hold, lower, or extend any step based on how a patient responds.

Safety, Storage, and Legal Notes

• Refrigerate compounded vials at 2–8 °C (36–46 °F) and never freeze them.
• Protect the vial from direct light, and inspect the liquid for particles or discoloration before each draw.
• Use a new needle and syringe every time, and never share injection supplies.
• Report severe or persistent side effects to a healthcare professional promptly.

Semaglutide is a prescription medication, and buying it from unverified sources carries real risks of contamination, incorrect concentration, and dosing errors. Compounded semaglutide is not FDA-approved, and its safety and effectiveness have not been reviewed by the agency.

Charts for unrelated compounds do not transfer to GLP-1 medications. A bpc-157 dosage chart by weight, for instance, describes a research peptide with entirely different dosing logic, and a cagrisema dosage chart covers a separate investigational drug combination.

The Bottom Line

At 5 mg/mL, the math is simple once you know the concentration: divide the milligram dose by five to get milliliters, then multiply by 100 to get units on a U-100 syringe. The concentration matters as much as the dose, so re-check the vial label every time you refill. When in doubt, call your pharmacist before you inject.

COMMON QUESTIONS

Frequently Asked Questions

How many units is 0.25 mg of semaglutide at 5 mg/mL?

At 5 mg/mL, 0.25 mg equals 0.05 mL, which is 5 units on a U-100 insulin syringe. The same 0.25 mg dose would be 10 units at 2.5 mg/mL and 2.5 units at 10 mg/mL, so concentration matters as much as the milligram dose.

Is 2.5 mg a standard semaglutide dose?

No. Semaglutide titration typically starts at 0.25 mg and steps through 0.5 mg, 1 mg, 1.7 mg, and 2.4 mg. The 2.5 mg figure is the starting dose for tirzepatide, which is a different medication.

Can I use a 5 mg/mL chart for a 10 mg/mL vial?

No. A 10 mg/mL vial is twice as strong, so the same milligram dose requires half the volume and half the units. Recalculate using the concentration printed on your vial and confirm the change with your pharmacist or prescriber before injecting.