Page last checked 2026-09-07

Semaglutide dosing chart in units

The units for a semaglutide dose depend on the strength of the liquid and the syringe. Enter the total mg in your vial, its total mL and your syringe type to see each draw.

Total drug in vial: 5 mg
Total liquid volume: 2 mL
Syringe: U-100 insulin syringe · 1 mL · lines every 2 units

Total drug in vialmg, not mg/mL

Total liquid volumefrom the label or preparation instructions

Syringecapacity and mark spacing

U-100 insulin syringe · 1 mL · lines every 2 units · 1 unit = 0.01 mL

Dose conversions

Read the calculated units and volume for each dose. The closest line shows any gap between that draw and a syringe mark.

2.50 mg/mL · 25 mcg per unit · 5 of 5 match a modeled mark

Selected Semaglutide doses converted at 5 mg in 2 mL on a U-100 insulin syringe · 1 mL · lines every 2 units. The closest syringe line shows the gap; it is not a reason to round the dose.
Dose	Calculated draw	Closest line
0.25 mg	10.0 units0.100 mL	10 unitsExact match
0.5 mg	20.0 units0.200 mL	20 unitsExact match
1 mg	40.0 units0.400 mL	40 unitsExact match
1.7 mg	68.0 units0.680 mL	68 unitsExact match
2.4 mg	96.0 units0.960 mL	96 unitsExact match

About these figures These are conversion examples, not a dosing or rounding plan. Follow your prescriber’s dose and the pharmacy’s instructions.

5 mg ÷ 2 mL = 2.50 mg/mL
→ dose ÷ 2.50 ÷ 0.01 = units

Convert units back to a dose

What does this unit count contain?

The other direction, using the vial set above. A unit count does not identify the syringe, so all three syringe types are shown.

Syringe unitsarrow keys change one unit

The result uses the total drug amount and liquid volume entered above.

That draw carries

250mcg

0.25 mg · 0.100 mL · 2.50 mg/mL · 25.0 mcg per unit · 20 draws per vial

The same 10 units on each syringe

U-100 · 1 mL0.01 mL per unit250 mcg
U-100 · 0.5 mL0.01 mL per unit250 mcg
U-40 · 1 mL0.025 mL per unit625 mcg

The same number of units can mean a different amount on a different syringe. The largest and smallest amounts here differ by 2.5×. Check whether yours is U-100 or U-40, and how much the barrel holds.

Volume drawn

0.100 mL

10 units × 0.01 mL per unit

Draws in the vial

5 mg vial at 250 mcg a draw

Arithmetic, not a dose. This reads a draw somebody has already described. It says what that unit number carries from the vial described above — not whether that amount is right for anyone.

5 mg ÷ 2 mL = 2.50 mg/mL
→ 25.0 mcg/unit × 10 units = 250.0 mcg

1 unit on a U-100 insulin syringe · 1 mL · lines every 2 units is 0.01 mL, whatever is in the vial. Nothing on this panel is stored or sent anywhere.

How milligrams become syringe units

Divide the total mg by the total mL to find the strength, or concentration, in mg/mL. Divide the dose in mg by that strength to get the draw in mL. On a U-100 syringe, multiply the draw in mL by 100 to get units.

Example: 5 mg in 2 mL

The concentration is 2.5 mg/mL. Each U-100 unit holds 25 mcg.

0.25 mg dose: 10 units (0.1 mL)
2.4 mg dose: 96 units (0.96 mL)

These are conversion examples, not a plan for which dose to take. For a ready-mixed vial, use the strength on its label. Do not add water based on this chart.

One syringe mark is a larger share of a small draw

The 1 mL U-100 syringe shown here has a mark every 2 units. With the example vial, 5 of 5 doses land on a mark. When a draw falls between marks, the chart shows the nearest one and how far off it is.

At 10 units, one 2-unit interval is 20% of the draw. At 96 units, that same interval is 2.08%. The dose and the spacing of the syringe marks both matter.

Your syringe may have different marks. Check its type and the vial strength against the pharmacy’s instructions.

The same dose can need more or fewer units

At 5 mg/mL, the same 0.25 mg dose needs 5 U-100 units. At the opening 2.5 mg/mL, it is 10 units.

Two charts can show different units for the same dose because the vial strengths differ. Use the details for your own vial. If the draw does not fit your syringe’s marks, ask the pharmacy how to measure it.

Ozempic and Wegovy use different doses

Both contain semaglutide, but their dosing schedules differ. Selected doses from 0.25 mg to 2.4 mg are shown here. Other brand doses and forms are not covered by this chart.

Syringe units are not pen clicks. A pen may have a dose dial or hold one fixed dose. Use the instructions for your own pen or vial.

Full semaglutide dosage reference

Questions about semaglutide units

How many units is 0.25 mg of semaglutide?

At 5 mg in 2 mL, it is 10 U-100 units. At 5 mg/mL, it is 5 units. You need the vial strength to know which unit count applies.

How much semaglutide is in 20 units?

At the opening concentration, 20 U-100 units contain 0.5 mg. “Convert units back to a dose” uses your vial details to show the dose for each syringe type. A U-100 unit is 0.01 mL whether the barrel holds 0.5 mL or 1 mL. A U-40 unit is 0.025 mL.

Should I change the amount of water?

Follow the dispensing pharmacy’s mixing instructions. The chart shows how the amount of liquid changes the unit count; it does not tell you to change your mix.

Why does 2.4 mg nearly fill the example syringe?

At the example strength of 2.5 mg/mL, it needs 0.96 mL, or 96 U-100 units. That is the math for this vial strength, not advice on how much to inject.

Work out one prescribed dose

The semaglutide calculator works out the draw for one dose. For other compounds, use the peptide calculator.

HealthspanLedger · https://healthspanledger.com/tools/semaglutide-dosing-chart-in-units