How long will my vial last?
A vial holds its mg divided by the amount per shot. A 10 mg vial at 1 mg a shot holds 10 shots; taken once a week, that is 10 weeks of supply. That is supply only. How long a mixed vial stays usable depends on your product’s labeling.
Enter your amount per shot to see how many shots a 10 mg vial holds and how long it lasts.
How the math works
- Shots per vial = vial mg ÷ amount per shot. Put both in the same unit first: 1 mg is 1,000 mcg, so a 5 mg vial at 250 mcg is 5,000 ÷ 250 = 20 shots.
- Time it lasts = shots ÷ shots per week. 20 shots taken once a day is about 20 days; taken 3 times a week, about 6.7 weeks.
- Water does not change the count. Mixing with 3 mL instead of 2 mL makes each draw bigger on the syringe, but the vial still holds the same mg.
- If your amount steps up, the vial runs out sooner. GLP-1 schedules usually move up every few weeks, so count at the amount you will actually be taking.
- Expect a little less in practice. Some liquid stays in the vial and in the syringe, so the last shot can come up short.
How long a 10 mg vial lasts
At the typical amount the main Pepdex calculator fills in when you pick each compound. These are examples for the arithmetic, not advice for you; enter your own amount above.
| Compound | Typical amount | Schedule used | Shots in 10 mg | Lasts |
|---|---|---|---|---|
| Retatrutide* | 4 mg | once a week | 2 | about 2 weeks |
| Tirzepatide* | 7.5 mg | once a week | 1 | about 1 week |
| Semaglutide* | 1 mg | once a week | 10 | about 10 weeks |
| Ipamorelin | 200 mcg | once a day | 50 | about 50 days (7.1 weeks) |
| CJC-1295 | 100 mcg | once a day | 100 | about 100 days (14.3 weeks) |
| Tesamorelin | 2 mg | once a day | 5 | about 5 days |
| BPC-157 | 250 mcg | once a day | 40 | about 40 days (5.7 weeks) |
| MOTS-c | 7.5 mg | 3 times a week | 1 | about 2 days |
| TB-500 | 2.5 mg | twice a week | 4 | about 2 weeks |
| Sermorelin | 300 mcg | once a day | 33 | about 33 days (4.7 weeks) |
| KPV | 350 mcg | once a day | 28 | about 28 days (4 weeks) |
* Often stepped up over time. If the amount rises before the vial is used up, it runs out sooner than this row.
Vial duration questions
- Does adding more BAC water make a vial last longer?
- No. The number of shots depends only on the mg in the vial and the mg per shot. More water spreads the same peptide through more liquid, so each draw is bigger in units, but the vial empties after the same number of shots.
- How many doses are in a 10 mg vial?
- 10 mg is 10,000 mcg, so divide by your amount: 4 doses at 2.5 mg, 5 at 2 mg, 10 at 1 mg, 40 at 250 mcg and 100 at 100 mcg.
- How long is a mixed vial good for?
- That is a different question from supply, and arithmetic cannot answer it. How long a reconstituted vial stays usable depends on the product and its labeling, or on what the pharmacist who supplied it tells you. This calculator only counts shots.
- What if I miss a shot or change my amount?
- A skipped shot makes the vial last longer; a higher amount makes it run out sooner. Run the numbers again with what is left and your new amount.
Reconstitution calculators
Educational reference. Pepdex does not sell peptides or recommend vendors. This page counts supply; it does not say how long a mixed vial stays usable or what amount is right for you.