Tirzepatide dosage calculator

Turn your prescribed tirzepatide dose in mg into units on a U-100 insulin syringe.

–units on a U-100 insulin syringe
–mL to draw

How the math works

mL to draw = dose (mg) ÷ vial strength (mg/mL). Units = mL × 100. Example: 5 mg from a 10 mg/mL vial is 0.5 mL, which is 50 units.

Questions

How many units is 2.5 mg of tirzepatide?

At 10 mg per mL, 2.5 mg is 0.25 mL, which is 25 units on a U-100 insulin syringe. At 20 mg per mL it is 12.5 units. Use the strength printed on your vial.

Why are tirzepatide doses bigger numbers than semaglutide?

They are different medicines with different dose ranges. Tirzepatide doses are typically 2.5 to 15 mg per week, while semaglutide doses are typically 0.25 to 2.4 mg per week.

Can I use this for Zepbound or Mounjaro pens?

Brand pens are single-dose and pre-measured, so no conversion is needed. Zepbound single-dose vials and compounded vials are drawn with a syringe, which is what this calculator is for.