Tirzepatide reconstitution calculator
Calculate volume and syringe units for Tirzepatide from the values you enter. Outputs do not determine a suitable dose or verify your inputs. Free, no account needed.
Draw 50 units (0.5 mL) on a U-100 · 1 mL for a 2.5 mg dose. Each vial gives about 4 doses.
Arithmetic based on the values you enter. Outputs do not determine a suitable dose or verify your inputs. Free account: save your protocol and log doses. Pro adds scheduled email reminders, inventory estimates, and trends — 7-day free trial. The calculator stays free forever.
How to use this Tirzepatide calculator
- Enter the vial size printed on your label — Tirzepatide is commonly sold as 5 mg, 10 mg, 15 mg, 30 mg.
- Enter the bacteriostatic water you added, in mL.
- Enter your dose, in mg.
- Pick your syringe — the units, fill bar and warnings all adjust to it.
Worked example
A 10 mg Tirzepatide vial reconstituted with 2 mL of bacteriostatic water gives a concentration of 5 mg/mL. A 2.5 mg dose is 0.5 mL — which is 50 units on a U-100 insulin syringe, and about 4 doses per vial.
The calculator above is already loaded with these numbers. Change any field to match your own vial.
Common questions
How much bacteriostatic water do I add to a 10 mg tirzepatide vial?
There is no single correct amount — the water volume is your choice, and it only changes the concentration, never the amount of peptide you receive. More water means a larger, easier-to-measure draw; less water means a smaller one. 2 mL into a 10 mg vial gives 5 mg/mL, which makes most commonly referenced weekly amounts land on easy-to-read syringe marks.
Why is tirzepatide usually referenced weekly rather than daily?
Research literature describes a half-life of roughly 5 days, which is why studies typically use a once-weekly schedule. A longer half-life means the compound clears slowly, so weekly administration is what the published trials model.
How many doses will one vial give me?
Divide the vial's total mg by your dose in mg. The calculator does this for you and shows 'doses per vial'. Concentration does not change this number — only the vial size and your dose do.
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Dose figures are ranges commonly referenced in research literature — not recommendations or medical advice. Arithmetic uses the values entered; it does not determine a suitable dose or verify your inputs. Research-only labeling does not establish that a substance is safe, approved or appropriate for personal use. Verify calculations independently and consult a qualified healthcare professional about health decisions.