Retatrutide calculator
Retatrutide Reconstitution Calculator
Draw to
On a U-100 insulin syringe. 100 units = 1 mL.
Common Retatrutide vial sizes
Retatrutide is commonly supplied as 5, 10, 12, 20 mg vials. A common starting point is 10 mg reconstituted with 2 mL of bacteriostatic water, which gives 5 mg/mL.
How to reconstitute Retatrutide
- Add 2 mL of bacteriostatic water (or your chosen volume) slowly down the side of the vial.
- Swirl gently until the solution is clear. Do not shake.
- Enter your vial size, water volume, and dose in the calculator above.
- Draw to the exact unit mark it highlights on the syringe.
Example dose in units
At 5 mg/mL, a 1 mg dose of Retatrutide is about 20 units on a U-100 insulin syringe. Change any value above to match your own vial.
Storage and handling
Retatrutide has an approximate half-life of 160 hours. Once reconstituted, peptides are generally kept refrigerated and protected from light, and are often used within about 28 days. See our storage guide for general handling information.
Frequently asked questions
- How is retatrutide reconstituted?
- Like other lyophilized peptides: add bacteriostatic water, swirl gently, let it dissolve. The calculator converts your vial strength and water volume into units to draw.
Related calculators and guides
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Stackr saves every vial you reconstitute, tracks doses remaining, and reminds you to reorder before you run out. The reference app for people who take their protocol seriously.
Educational tool only, not medical advice. Peptides are research chemicals, not for human consumption. Full disclaimer.