15 mg vial + 2.5 mL bacteriostatic water
A 15 mg vial reconstituted with 2.5 mL comes to 6 mg/mL. Every unit on a U-100 insulin syringe then carries 60 mcg, so 500 mcg is 8.3 units (0.083 mL) and the vial holds 30 draws of that size.
Units for each amount
| Dose | mL | U-100 units | U-40 units | Doses per vial |
|---|---|---|---|---|
| 50 mcg | 0.0083 | 0.83 | 0.33 | 300 |
| 100 mcg | 0.017 | 1.7 | 0.67 | 150 |
| 150 mcg | 0.025 | 2.5 | 1 | 100 |
| 200 mcg | 0.033 | 3.3 | 1.3 | 75 |
| 250 mcg | 0.042 | 4.2 | 1.7 | 60 |
| 300 mcg | 0.05 | 5 | 2 | 50 |
| 400 mcg | 0.067 | 6.7 | 2.7 | 37 |
| 500 mcg | 0.083 | 8.3 | 3.3 | 30 |
| 750 mcg | 0.13 | 12.5 | 5 | 20 |
| 1 mg | 0.17 | 16.7 | 6.7 | 15 |
| 1.5 mg | 0.25 | 25 | 10 | 10 |
| 2 mg | 0.33 | 33.3 | 13.3 | 7 |
| 2.5 mg | 0.42 | 41.7 | 16.7 | 6 |
| 5 mg | 0.83 | 83.3 | 33.3 | 3 |
| 10 mg | 1.67 | 166.7 | 66.7 | 1 |
Same vial, other volumes
The mass does not move. Only the concentration and the unit count do.
| Water | mg/mL | mcg per unit | 500 mcg = | |
|---|---|---|---|---|
| 0.5 mL | 30 | 300 | 1.7 units | table → |
| 1 mL | 15 | 150 | 3.3 units | table → |
| 1.5 mL | 10 | 100 | 5 units | table → |
| 2 mL | 7.5 | 75 | 6.7 units | table → |
| 2.5 mL | 6 | 60 | 8.3 units | |
| 3 mL | 5 | 50 | 10 units | table → |
| 5 mL | 3 | 30 | 16.7 units | table → |
Same concentration, different vial
These pairs also come to 6 mg/mL, so their unit counts match this page exactly; only the number of draws per vial differs: 3 mg + 0.5 mL, 30 mg + 5 mL.
Try other numbers
15 mg + 2.5 mL questions
What concentration is 15 mg in 2.5 mL?
15 mg divided by 2.5 mL is 6 mg/mL, which is 6,000 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 60 mcg.
How many units is 500 mcg from a 15 mg vial with 2.5 mL?
500 mcg divided by 6,000 mcg/mL is 0.083 mL, which is 8.3 units on a U-100 syringe and 3.3 units on a U-40 syringe. The vial holds 30 draws of that size.
What if I add 3 mL instead of 2.5 mL to the 15 mg vial?
The mass stays 15 mg. With 3 mL the concentration is 5 mg/mL instead of 6 mg/mL, so the same amount per draw needs more units: 500 mcg becomes 10 units instead of 8.3.
Does a 15 mg vial hold 2.5 mL?
Usually. Most lyophilized peptide vials are 2 mL or 3 mL glass, and 2.5 mL fits with room to swirl. Check the vial if it is an unusually small format.
Brands we recommend. We are independent and have no affiliation with any brand: no affiliate links, no referral codes, no paid placements. These are the suppliers whose testing and certificates hold up when we check them.
- Licensed Peptides two accredited labs on every lot, certificates public, card and Apple Pay checkout
- Core Peptides long track record, public certificates, wide catalog
- Ascension Peptides public third-party testing, clear pricing