Tirzepatide Dosage Calculator
Mounjaro, Zepbound
Tirzepatide (the GIP/GLP-1 agonist sold as Mounjaro and Zepbound) has an FDA label, so the dosing is spelled out. It's a once-weekly subcutaneous shot that starts at 2.5 mg and climbs by 2.5 mg every 4 weeks as tolerated, up to a 15 mg ceiling. Enter your vial and target dose for the exact draw.
Common Tirzepatide doses (once weekly)
Concentration
5.00
mg/ml
5000 mcg/ml
Volume per Dose
0.500
ml
Draw this amount
Syringe Draw
50
IU
100-unit insulin syringe
Supply per Vial
4.0
weeks
At 2.5 mg/week
Draw to
50.0 units
Draw to this line
Tirzepatide Titration Schedule & Dose Chart
Syringe units below assume a 10 mg vial in 2 ml of BAC water (5.0 mg/ml). Adjust the calculator above for your own mix.
| Week | Weekly Dose | Volume | Syringe Draw |
|---|---|---|---|
| 1-4 | 2.5 mg | 0.50 ml | 50 IU |
| 5-8 | 5 mg | 1.00 ml | 100 IU |
| 9-12 | 7.5 mg | 1.50 ml | 150 IU |
| 13-16 | 10 mg | 2.00 ml | 200 IU |
| 17-20 | 12.5 mg | 2.50 ml | 250 IU |
| 21+ | 15 mg | 3.00 ml | 300 IU |
Maximum studied dose: 15 mg once weekly. Step up only if side effects are tolerable.
These figures follow the published Tirzepatide labeling. Individual protocols vary and dosing should be set with a qualified clinician. BodyHackGuide publishes for research and educational purposes only.
Tirzepatide Dosing FAQ
Free 2026 Peptide Cheat Sheet — 50 pages, PDF
Dosing, reconstitution, stacks, half-lives, and vendor trust tiers. The reference we wish we had on day one.
