20 Units of Semaglutide Is How Many mg?

It depends on the concentration. Here is what 20 units on a U-100 syringe holds at every common Semaglutide mix, with the math.

Medically reviewed by Juan Pablo Frías, MD · 3 Oct 2026 · DisclosureGLP-1 agonistUpdated 3 Oct 2026

20 units: 0.20 mL; U-100 syringe
At 5 mg/mL: 1 mg; 10 mg vial + 2 mL
At 10 mg/mL: 2 mg; 20 mg vial + 2 mL

The short answer

20 units on a U-100 insulin syringe is 0.20 mL. How many mg that holds depends on how concentrated the solution is: mg = mL × mg per mL. For example, 20 units of a 5 mg/mL solution is 1 mg.

20 units at each concentration

Concentrations you get from the vial sizes Semaglutide is sold in, mixed with 1 to 3 mL of bacteriostatic water.

20 units of Semaglutide in mg by concentration
Concentration	Example mix	mg in 20 units
1 mg/mL	2 mg + 2 mL · 3 mg + 3 mL	0.2 mg
1.2 mg/mL	3 mg + 2.5 mL	0.24 mg
1.5 mg/mL	3 mg + 2 mL	0.3 mg
1.667 mg/mL	5 mg + 3 mL	0.333 mg
2 mg/mL	2 mg + 1 mL · 5 mg + 2.5 mL	0.4 mg
2.5 mg/mL	5 mg + 2 mL	0.5 mg
3 mg/mL	3 mg + 1 mL	0.6 mg
3.333 mg/mL	10 mg + 3 mL	0.667 mg
4 mg/mL	10 mg + 2.5 mL	0.8 mg
5 mg/mL	5 mg + 1 mL · 10 mg + 2 mL	1 mg
6 mg/mL	15 mg + 2.5 mL	1.2 mg
6.667 mg/mL	20 mg + 3 mL	1.333 mg
7.5 mg/mL	15 mg + 2 mL	1.5 mg
8 mg/mL	20 mg + 2.5 mL	1.6 mg
10 mg/mL	10 mg + 1 mL · 20 mg + 2 mL	2 mg
12 mg/mL	30 mg + 2.5 mL	2.4 mg
15 mg/mL	15 mg + 1 mL · 30 mg + 2 mL	3 mg
20 mg/mL	20 mg + 1 mL	4 mg
30 mg/mL	30 mg + 1 mL	6 mg

Branded pens deliver preset doses and are not measured in syringe units. This math applies to solutions drawn from a vial with an insulin syringe.

How to work it out

1. Concentration = vial mg ÷ mL of water added (a 10 mg vial + 2 mL = 5 mg/mL). 2. Volume = units ÷ 100 (20 units = 0.20 mL). 3. mg = volume × concentration.

Work it out for your vial

Other unit amounts

8 units

Common questions

20 units of Semaglutide is how many mg?

On a U-100 syringe, 20 units is 0.20 mL. Multiply by the concentration: at 5 mg/mL that is 1 mg; at 10 mg/mL it is 2 mg. Check the concentration on your vial or prescription label.

How many mL is 20 units?

0.20 mL. A U-100 insulin syringe holds 100 units per mL, so units ÷ 100 = mL.

Is 20 units of Semaglutide a normal dose?

Units measure volume, not dose. The same number of units holds a different amount of drug at each concentration, which is why this page does not judge doses.

More on Semaglutide

DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.Side effectsWhat labels and studies report, and what is unknown.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.Legal statusFDA, compounding and WADA status with dates.

Sources

1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026

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