Tirzepatide Reconstitution & Dose Calculator
Tirzepatide is a dual GIP and GLP-1 receptor agonist, the same molecule sold under the brand names Mounjaro and Zepbound. This free calculator turns a Tirzepatide vial plus bacteriostatic water into the exact insulin syringe units to draw. It is unit-conversion math, not a dosing recommendation. Tirzepatide vials are commonly 10 mg, 30 mg, so the tool below starts at 10 mg; change any field to match your own vial.
Reconstitution calculator
Pick your peptide, vial size, and BAC water. Get exact units to draw on a 1 mL insulin syringe.
Pick your peptide
Type to search, or pick from the dropdown. Auto-fills the recommended vial size.
- • Standard insulin syringe = 100 units total
- • Small markings = 1 unit each
- • Large markings = 10 units (0.1 mL)
- • 100 units = 1 mL
Always verify reconstitution math against a second source before any dose you actually inject.
Tirzepatide concentration at a glance
Concentration is just vial mg divided by the bacteriostatic water you add. A more dilute mix gives a bigger, easier-to-read draw on the syringe. Here is a 10 mg Tirzepatide vial at three common water volumes (U-100 insulin syringe, where 1 unit = 0.01 mL):
| BAC water | Concentration | Per insulin unit | 50 units draws |
|---|---|---|---|
| 1 mL | 10 mg/mL | 100 mcg | 5 mg |
| 2 mL | 5 mg/mL | 50 mcg | 2.50 mg |
| 3 mL | 3.33 mg/mL | 33.33 mcg | 1.67 mg |
Worked example: a 10 mg Tirzepatide vial in 2 mL of bacteriostatic water is 5 mg/mL. One unit on a U-100 pin is 50 mcg, so if your protocol calls for 2.50 mg you would draw to 50 units. That is arithmetic from the numbers you enter, nothing more. Pepdex does not tell you what dose to take.
Tirzepatide reconstitution questions
- How do you reconstitute Tirzepatide?
- Add bacteriostatic water to the dry Tirzepatide vial slowly down the side, let it dissolve without shaking, and store it in the fridge. The amount of water you add sets the concentration. A 10 mg vial in 2 mL of water is 5 mg/mL; the same vial in 1 mL is 10 mg/mL. Use the calculator above with your own vial and water to see the exact result.
- How many insulin units is a dose of Tirzepatide?
- It depends entirely on how much water you mixed, because milligrams describe the powder and units describe the volume drawn. With a 10 mg vial reconstituted in 2 mL, one unit on a U-100 pin is 50 mcg, so 50 units draws 2.50 mg. Change the water and that number changes. Enter your numbers above to get yours.
- What vial sizes does Tirzepatide come in?
- Commonly 10 mg, 30 mg. The calculator defaults to 10 mg for Tirzepatide but you can set any vial size. Always work from the mg printed on the vial you actually have, not a number from a forum.
- Is tirzepatide the same as semaglutide?
- No. Semaglutide acts on one receptor (GLP-1); tirzepatide acts on two (GIP and GLP-1). They are different molecules at different vial strengths, so you cannot reuse one compound's reconstitution numbers for the other. Use the calculator with the mg printed on your own vial.
- Is the Tirzepatide calculator free?
- Yes. The reconstitution and units math is completely free with no account. A free account adds saving your protocol plus a 3-day trial of the AI Coach and Personal Stack.
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Educational reference only. Pepdex does not sell peptides, recommend vendors, or tell you what dose to take. Tirzepatide reconstitution math here is unit conversion you can verify by hand. Talk to a qualified provider about your own use.