Tirzepatide units to mg converter

Type the strength from your vial's label and the units you draw to see the mg. Switch the unit to mg to go the other way.

mg = units ÷ 100 × strength (mg/mL)

Your vial

Powder + waterI mixed it Pre-mixedlabel shows mg/mL

Label strength

Amount

Syringe

0.3 mL30 units 0.5 mL50 units 1 mL100 units

This does arithmetic on the numbers you type. It doesn't suggest a dose. Check the result with your prescriber or pharmacist.

Draw to

–units

Fill in the label strength and amount

–

Strength

–

Syringe fill

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Per unit

Worked example

A vial labelled 10 mg/mL. 40 units is 0.4 mL, and 0.4 mL × 10 mg/mL = 4 mg. The other way, 3 mg ÷ 10 mg/mL = 0.3 mL, which is 30 units.

How the math works

A unit on a U-100 syringe is 0.01 mL, so mg = units ÷ 100 × strength, and units = mg ÷ strength × 100.

If you mixed the vial yourself, its strength is the mg in the vial divided by the water you added. Pick "Powder + water" above and the calculator works it out.

It's the same code the PepBloom app runs, and it runs in your browser. Nothing you type leaves this page.

Questions

How many mg is 50 units of tirzepatide?

50 units is always 0.5 mL on a U-100 syringe. How many mg that holds depends on your vial's strength, so type the mg/mL from your label above.

Is a unit the same as a mg?

No. A unit on an insulin syringe is a volume: 0.01 mL (U-100 means 100 units in each mL). A mg is an amount of medicine. The same 10 units hold more mg in a stronger vial.

Do Zepbound and Mounjaro pens use units?

No. Zepbound and Mounjaro are FDA-approved, and their labels give each dose in mg (Zepbound label, Mounjaro label). Units come up with compounded tirzepatide, which isn't FDA-approved: a pharmacy's instructions may give the amount in units. FDA has had reports of people measuring the wrong amount from compounded vials (FDA).

Sources

tirzepatide (Mounjaro, Zepbound) · Peptide calculator · Units to mL · Vial run-out date