3 mg vial + 3 mL bacteriostatic water
A 3 mg vial reconstituted with 3 mL comes to 1 mg/mL. Every unit on a U-100 insulin syringe then carries 10 mcg, so 250 mcg is 25 units (0.25 mL) and the vial holds 12 draws of that size.
Units for each amount
| Dose | mL | U-100 units | U-40 units | Doses per vial |
|---|---|---|---|---|
| 50 mcg | 0.05 | 5 | 2 | 60 |
| 100 mcg | 0.1 | 10 | 4 | 30 |
| 150 mcg | 0.15 | 15 | 6 | 20 |
| 200 mcg | 0.2 | 20 | 8 | 15 |
| 250 mcg | 0.25 | 25 | 10 | 12 |
| 300 mcg | 0.3 | 30 | 12 | 10 |
| 400 mcg | 0.4 | 40 | 16 | 7 |
| 500 mcg | 0.5 | 50 | 20 | 6 |
| 750 mcg | 0.75 | 75 | 30 | 4 |
| 1 mg | 1 | 100 | 40 | 3 |
| 1.5 mg | 1.5 | 150 | 60 | 2 |
| 2 mg | 2 | 200 | 80 | 1 |
| 2.5 mg | 2.5 | 250 | 100 | 1 |
Same vial, other volumes
The mass does not move. Only the concentration and the unit count do.
| Water | mg/mL | mcg per unit | 250 mcg = | |
|---|---|---|---|---|
| 0.5 mL | 6 | 60 | 4.2 units | table → |
| 1 mL | 3 | 30 | 8.3 units | table → |
| 1.5 mL | 2 | 20 | 12.5 units | table → |
| 2 mL | 1.5 | 15 | 16.7 units | table → |
| 2.5 mL | 1.2 | 12 | 20.8 units | table → |
| 3 mL | 1 | 10 | 25 units | |
| 5 mL | 0.6 | 6 | 41.7 units | table → |
Same concentration, different vial
These pairs also come to 1 mg/mL, so their unit counts match this page exactly; only the number of draws per vial differs: 1 mg + 1 mL, 2 mg + 2 mL, 5 mg + 5 mL.
Try other numbers
3 mg + 3 mL questions
What concentration is 3 mg in 3 mL?
3 mg divided by 3 mL is 1 mg/mL, which is 1,000 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 10 mcg.
How many units is 250 mcg from a 3 mg vial with 3 mL?
250 mcg divided by 1,000 mcg/mL is 0.25 mL, which is 25 units on a U-100 syringe and 10 units on a U-40 syringe. The vial holds 12 draws of that size.
What if I add 5 mL instead of 3 mL to the 3 mg vial?
The mass stays 3 mg. With 5 mL the concentration is 0.6 mg/mL instead of 1 mg/mL, so the same amount per draw needs more units: 250 mcg becomes 41.7 units instead of 25.
Does a 3 mg vial hold 3 mL?
Usually. Most lyophilized peptide vials are 2 mL or 3 mL glass, and 3 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