Convert a tirzepatide dose in milligrams to units on a U-100 insulin syringe. Enter the concentration your vial was mixed to, then the dose, and the converter returns the exact draw.
Reviewed for accuracy · Last reviewed July 7, 2026Units for common tirzepatide doses at three example concentrations. A U-100 insulin syringe holds 100 units in 1 mL, so any value above 100 units needs more than one full syringe at that concentration.
| Dose | 2.5 mg/mL | 5 mg/mL | 10 mg/mL |
|---|---|---|---|
| 2.5 mg | 100 units | 50 units | 25 units |
| 5 mg | 200 units* | 100 units | 50 units |
| 7.5 mg | 300 units* | 150 units* | 75 units |
| 10 mg | 400 units* | 200 units* | 100 units |
| 12.5 mg | 500 units* | 250 units* | 125 units* |
| 15 mg | 600 units* | 300 units* | 150 units* |
The math is the same at any concentration. Divide your dose in milligrams by the concentration in mg/mL to get the volume in milliliters, then multiply by 100 to get units on a U-100 syringe. For example, 5 mg divided by 5 mg/mL is 1 mL, which is 100 units. To go the other way, divide units by 100 for the volume in mL, then multiply by the concentration.
The concentration comes from reconstitution: a 10 mg vial mixed with 2 mL of bacteriostatic water is 5 mg/mL. To work out the concentration and draw for your own vial, use the tirzepatide dosage calculator or the reconstitution calculator.
This tool is an independent educational reference and is not medical advice. Talk to a doctor before starting or adjusting any compound.