Free tool
Tirzepatide
calculator.
Vial, water, dose — exact insulin syringe units for Tirzepatide. Preloaded with the numbers people actually use.
Volume to draw
Concentration
Vial lasts
Dose exceeds this syringe — add less water or use a bigger syringe.
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The Reconstitution Card, free PDFDoses and units for eight peptides on one page
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Dosing in practice
Compounded tirzepatide starts near 2.5 mg once weekly, titrating toward 5 to 15 mg. Doses are in milligrams — enter them as thousands of micrograms. The pharmacy label decides.
This tool explains the math on your pharmacy label. It does not choose a dose — that decision belongs to your physician.
Common questions
How to reconstitute 30 mg of tirzepatide?
Enter 30 in the vial field. With 1.5 ml of water that is 20 mg per ml, so a 2.5 mg dose is 0.125 ml — 12.5 units.
How much is 2.5 mg in units?
With a 10 mg vial and 2 ml of water, 2.5 mg is 0.5 ml — 50 units, a full small insulin syringe.
Does this apply to Mounjaro or Zepbound pens?
No. Pens are pre-filled with a fixed dose and need no math.
Need the prescription first?
A licensed physician reviews your case online and a US pharmacy ships the protocol with dosing printed on the label.
Talk to a doctor