ToolsDose math · Compounded vials
Tirzepatide Dose ↔ Unit Converter
mg ↔ units on a U-100 syringe, for compounded vials
Enter the mg/mL concentration on your pharmacy label and your prescribed dose. For compounded liquid measured with a U-100 syringe only. This calculates volume; it does not choose a dose.
Read before you use this
Confirm the concentration, prescribed dose and syringe type with your pharmacist. Use the directions supplied with your medicine. This tool does not apply to pens, brand-product instructions or oral formulations, and does not tell you to prepare or dilute a medicine. Compounded medicines are not FDA-approved.
Use the tirzepatide concentration of the dispensed liquid, not total vial milligrams or an added ingredient. If unclear, ask the pharmacist.
Enter the dose your clinician prescribed. This tool does not select or change it.
Enter both positive numbers from your prescription and pharmacy label to see the arithmetic.
Math: units = prescribed mg ÷ mg/mL × 100. Reverse: mg = units ÷ 100 × mg/mL. For example, 2.5 mg at 20 mg/mL equals 0.125 mL or 12.5 U-100 units. This example is not a prescription. Results are displayed to 12 significant digits, not rounded to syringe graduations.
Where to get it
Where compounded vials come from
Unit math only matters if you have a vial. These are the telehealth programs we partner with, each with clinician review of an online intake.
CoreAge Rx
Compounded tirzepatide starting offer with order-stage and 30-day refund limits.
From $129/mo; confirm term and supplyCompounded tirzepatide
Found
Medication-specific four-week plans with separate cash, clinical-insurance and branded routes.
Cash $219 intro; then $359/4 weeksCompounded tirzepatide and brand-name GLP-1 options
Gala Health
Compounded GLP-1 options with yearly and three-month price labels to compare.
$179/mo yearly label; $199/mo 3-month offerCompounded GLP-1/GIP, including tirzepatide
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Understand the dosing math before you draw
The number is the easy part. Why “units” depend entirely on concentration, how brand dosing differs, and the real-world risks of compounded vials are the parts that matter — read these next:
This converter is informational and not medical advice. It performs simple arithmetic (units = prescribed mg ÷ pharmacy-label mg/mL × 100) and makes no judgment about what dose is safe or appropriate for you. Concentrations are not standardized across compounding pharmacies or even across vials, and an error here can cause a large overdose — always verify against your vial label and your prescribing clinician. FDA has documented measurement and concentration errors with compounded semaglutide; those reports are not tirzepatide-specific overdose statistics. Read the FDA dosing-error alert. Ask your pharmacist to resolve any discrepancy before injecting.