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Tirzepatide mg → units calculator
Draw Tirzepatide from a vial? Enter your concentration and dose to get insulin-syringe units (U-100) and the exact draw volume — or switch to units → mg to check what you drew.
GLPMate stores your tirzepatide concentration and counts doses left as you log each shot — with a magnified syringe read.
Not sure? It's the vial's total mg ÷ its total mL.
Typical Tirzepatide doses: 2.5, 5, 7.5, 10 mg.
2.5 mg ÷ 10 mg/mL × 100 = 25 units
Converting Tirzepatide mg to syringe units
Compounded Tirzepatide comes in a vial, and you draw each dose with an insulin syringe measured in units — not mg. The conversion is one step once you know your concentration:
units = (dose in mg ÷ concentration in mg/mL) × 100
The ×100 is because a U-100 syringe marks 100 units per mL. So the units number is just your draw volume in mL, read on a finer scale.
A worked example
A 10 mg/mL vial, 2.5 mg dose: 2.5 ÷ 10 = 0.25 mL, and 0.25 × 100 = 25 units.
Double-check every time something changes
Unit errors — a decimal in the wrong place — are the most common compounding mistake. Re-check whenever your vial, concentration or dose changes, and confirm with your pharmacist. GLPMate stores your concentration so the math is done once and reused on every log.
Educational arithmetic — not medical advice or a dosing recommendation. Your dose is set by your prescriber; confirm conversions with your pharmacist.
This tool is for general education only. It is not medical advice, not a diagnosis, and not a substitute for your prescriber or pharmacist. Doses and schedules are set by your clinician — never start, stop or change a medication based on a web calculator.
Sources
- U-100 insulin syringe standard — 100 units = 1 mL
- Product/vial label — concentration (mg/mL) must be read off your own vial
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Tirzepatide conversion questions
How do I convert Tirzepatide mg to units?
Units = (your dose in mg ÷ concentration in mg/mL) × 100. On a U-100 syringe, 100 units = 1 mL. Example: a 2.5 mg dose from a 10 mg/mL vial is 0.25 mL = 25 units. Set your own numbers above.
What is my concentration if the vial only lists total mg?
Divide the vial's total drug by its fluid volume. A vial labeled "10 mg / 0.5 mL" is 20 mg/mL. If your label already prints mg/mL, just use that number here.
What does U-100 mean, and what if I have a U-40 syringe?
U-100 means the syringe is marked so 100 units equal 1 mL — that's why units = mL × 100. A U-40 syringe marks 40 units per mL instead, so the same volume reads as a smaller unit number. Match the calculator to the syringe you actually have.
Can I convert units back to mg for Tirzepatide?
Yes — switch the mode above to "units → mg". mg = (units ÷ 100) × concentration. It's useful for double-checking what you actually drew.
Is this dosing advice?
No. It's arithmetic with a safety rail. Your dose is set by your prescriber, and unit errors are the most common compounding mistake — always confirm the number with your pharmacist, especially whenever your vial, concentration or dose changes.
Log the shot, not the math.
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