GLP Units

How many units is 2.5 mg of tirzepatide?

It depends on the strength printed on your vial.

GLP Units is a math tool, not medical advice. Always confirm your dose and syringe amount with your prescriber or pharmacist, and check your vial label.

On a U-100 insulin syringe, 2.5 mg of tirzepatide is 50 units at 5 mg/mL, 25 units at 10 mg/mL, 16.7 units at 15 mg/mL, 14.7 units at 17 mg/mL, 12.5 units at 20 mg/mL, 10 units at 25 mg/mL, 8.3 units at 30 mg/mL.

At 10 mg/mL, the strength most often seen on compounded labels, it is 0.25 mL, which is 25 units. Use the calculator with the strength printed on your own vial.

2.5 mg of tirzepatide in units at every strength

2.5 mg of tirzepatide at every vial strength, on a U-100 insulin syringe. Listed doses are for conversion only. Your prescriber sets your dose.
Vial strengthVolumeUnits (U-100)
5 mg/mL0.5 mL50 units
10 mg/mL0.25 mL25 units
15 mg/mL0.167 mL16.7 units
17 mg/mL0.147 mL14.7 units
20 mg/mL0.125 mL12.5 units
25 mg/mL0.1 mL10 units
30 mg/mL0.083 mL8.3 units

Dose ↔ units

Vial type

I know my…

How long will my vial last?

Uses the vial and dose from the calculator above.

Real vials can hold slightly more or less than the label says, and a little is lost in the needle.

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Same dose, different units

At 10 mg/mL, 2.5 mg is 25 units. Drawing those same 25 units from a 20 mg/mL vial gives 5 mg, not 2.5 mg. Always check the mg/mL on the vial you are using.

In July 2024 the FDA warned about dosing errors with compounded semaglutide, including mix-ups between mg, mL and units (FDA alert). The same math applies to any vial.

Questions

How many mL is 2.5 mg of tirzepatide?

It depends on the vial: 0.5 mL at 5 mg/mL, 0.25 mL at 10 mg/mL, 0.167 mL at 15 mg/mL, 0.147 mL at 17 mg/mL, 0.125 mL at 20 mg/mL, 0.1 mL at 25 mg/mL, 0.083 mL at 30 mg/mL.

Is 2.5 mg of tirzepatide the same number of units on every vial?

No. The units depend on the strength printed on the vial: 50 units at 5 mg/mL, 25 units at 10 mg/mL, 16.7 units at 15 mg/mL, 14.7 units at 17 mg/mL, 12.5 units at 20 mg/mL, 10 units at 25 mg/mL, 8.3 units at 30 mg/mL.

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