About Tirzepatide Dosage Calculator
A free, accurate tool for patients on compounded tirzepatide, built to take the guesswork out of weekly injections.
Why this tool exists: Thousands of patients using compounded tirzepatide from vials face the same weekly question: how many milliliters do I draw? The answer depends on your prescribed dose and your vial's concentration, and getting it wrong has real consequences. We built this calculator so patients can verify their dose calculation in seconds, with no account required and no data collected.
Built for Tirzepatide Patients
Every feature is specific to tirzepatide: the dose escalation schedule (2.5 mg through 15 mg), the compounded vial concentrations patients actually use (5 mg/mL and 10 mg/mL), and the insulin syringe unit conversion. Nothing generic.
Based on FDA Guidelines
The dose escalation schedule follows the FDA-approved titration protocol from Eli Lilly's Mounjaro and Zepbound prescribing information. The volumetric formula (mL = mg ÷ mg/mL) is standard pharmaceutical math, not a proprietary calculation.
No Ads, No Sign-Ups
This tool is completely free and always will be. We don't collect personal health information, we don't require accounts, and we don't sell data. Your dose calculations stay on your device.
Our Editorial Process
All calculator logic and blog content on this site is derived from primary sources: the FDA-approved prescribing information for Mounjaro (tirzepatide injection, for subcutaneous use) and Zepbound (tirzepatide injection, for subcutaneous use), published by Eli Lilly and Company; and peer-reviewed clinical trial data including the SURMOUNT and SURPASS trial series published in the New England Journal of Medicine.
Before any content is published, we verify every factual claim: dose amounts, concentration values, timing intervals, and clinical percentages, against these primary sources. Content is reviewed for accuracy when FDA labeling is updated or new clinical data becomes available.
Medical disclaimer: This site provides informational content only. It is not a substitute for professional medical advice from a licensed prescriber. Tirzepatide is a prescription medication; always follow your healthcare provider's specific dosing instructions, which may differ from the standard titration schedule shown here. If you have questions about your dose, contact your prescriber or compounding pharmacy.
Primary Sources
- FDA: Mounjaro (tirzepatide) Prescribing Information (accessdata.fda.gov)
- Jastreboff et al., SURMOUNT-1 Trial: Tirzepatide for Weight Management. N Engl J Med, 2022
- Eli Lilly, Zepbound Patient Information (zepbound.lilly.com)
- FDA: Compounding Pharmacy Regulations (503A and 503B facilities)
Contact Us
Found an error in our calculations, want to suggest a correction, or have a question about tirzepatide dosing? We read every message.
contact@tirzepatidedosagecalculator.com