Quick math example
A 10 mg vial mixed with 2 mL gives 5 mg/mL. A 2.5 mg dose is 0.5 mL, which equals 50 units on a U-100 syringe.
How the tirzepatide calculation works
Tirzepatide doses are often discussed in milligrams, while many vials and syringes require you to think in mg, mcg, mL, and units at the same time.
The calculator normalizes everything into concentration first, then returns a draw volume and matching syringe-unit result.
- 10 mg equals 10,000 mcg
- 10,000 mcg / 2 mL = 5,000 mcg per mL
- 2,500 mcg / 5,000 mcg per mL = 0.5 mL
When to re-check the math
Recalculate when you change vial size, BAC water volume, dose, syringe type, or syringe capacity. Saving the setup in PepSync helps avoid re-entering the same details each week.
Sources used
Frequently asked questions
Can I use this with Mounjaro or Zepbound pens?+
This calculator is for vial-based reconstitution math. Commercial pre-filled pens usually have fixed dosing and do not require a vial draw calculation.
Why is my tirzepatide draw volume large?+
A larger target dose or more dilute vial requires more mL. You can review your vial size, BAC water amount, and syringe capacity to confirm the setup.
Can PepSync save a tirzepatide protocol?+
Yes. The app is designed to save the vial, water, dose, schedule, and reminder details after the calculation is confirmed.