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How many units is 5 mg of tirzepatide?

At 5 mg/mL, 5 mg of tirzepatide is 100 units on a U-100 syringe. At 10 mg/mL, it's 50 units.

Dose calculator

How is your vial labeled?
mg
mL
mg

Example values — replace them with your tirzepatide label. For total mg + mL, enter all medication and actual liquid in the vial, not the container’s capacity. If your label lists mg/mL, choose concentration.

Your conversion

100unitson a U-100 syringe
Volume 1 mLConcentration 5 mg/mL
0102030405060708090100

10 mg ÷ 2 mL = 5 mg/mL. 5 mg ÷ 5 mg/mL × 100 = 100 units

Educational only. Always follow your prescriber's dose and confirm the numbers with your pharmacist.

5 mg in units, by vial strength

Vial concentrationUnits (U-100)Volume
5 mg/mL100 units1 mL
10 mg/mL50 units0.5 mL

Where 5 mg fits in the schedule

The first maintenance dose option. The label increases in 2.5 mg steps after at least 4 weeks on the current dose. Your prescriber sets your actual schedule — follow their instructions.

The formula

units = (dose mg ÷ concentration mg/mL) × 100

Example at 5 mg/mL: 5 ÷ 5 × 100 = 100 units.

Brand-name Zepbound and Mounjaro pens deliver fixed doses in mg — you don't count units with a pen. These numbers apply to vials drawn up with a syringe. Always follow your prescriber and your pharmacy label.

Check the label before converting

These calculations use example concentrations, not a universal tirzepatide strength. If a label gives total medication and liquid volume, divide mg by mL first. For example, 10 mg in 2 mL gives 5 mg/mL. Use the tirzepatide calculator for the numbers on your own label.

Compounded medications are not FDA-approved. The FDA’s semaglutide dosing-error alert explains how differing concentrations and confusion between units, mL, and mg can cause errors.

Sources and further reading

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