Semaglutide calculator
Semaglutide Reconstitution Calculator
Draw to
On a U-100 insulin syringe. 100 units = 1 mL.
Common Semaglutide vial sizes
Semaglutide is commonly supplied as 2, 3, 5, 10 mg vials. A common starting point is 5 mg reconstituted with 2 mL of bacteriostatic water, which gives 2.5 mg/mL.
How to reconstitute Semaglutide
- 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 2.5 mg/mL, a 0.25 mg dose of Semaglutide is about 10 units on a U-100 insulin syringe. Change any value above to match your own vial.
Storage and handling
Semaglutide has an approximate half-life of 168 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 much bacteriostatic water do I add to semaglutide?
- Any volume works mathematically; more water means an easier-to-measure draw. The calculator shows the resulting units for whatever volume you choose, and the recommended-water option finds a clean number.
- How many units is a 0.25 mg semaglutide dose?
- At 2.5 mg/mL (5 mg in 2 mL), 0.25 mg is 0.1 mL, which is 10 units on a U-100 syringe. Enter your own vial and water above to confirm.
Related calculators and guides
Keep this calculation in your pocket
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.