12 mg vial + 2.5 mL bacteriostatic water: units chart
A 12 mg vial mixed with 2.5 mL of bacteriostatic water holds 4,800 mcg per mL. This is a middle-strength mix: each unit holds 48 mcg, so most doses in the table land between 2 and 100 units on a 1 mL syringe.
Units to draw
5.2units
Draw 5.2 units on a U-100 syringe, between the 4- and 6-unit marks, closer to 6.
- Dose
- 250 mcg (0.25 mg)
- Volume
- 0.052 mL
- Concentration
- 4,800 mcg/mL (4.8 mg/mL)
- Per unit
- 48 mcg (0.048 mg)
- Full doses in vial
- 48
Show the math
- Convert the vial amount to mcgmg × 1,000 = mcg12 mg × 1,000 = 12,000 mcg
- Convert the dose to mcgmg × 1,000 = mcg0.25 mg × 1,000 = 250 mcg
- Concentrationvial (mcg) ÷ water (mL) = mcg per mL12,000 mcg ÷ 2.5 mL = 4,800 mcg/mL (4.8 mg/mL)
- Volume to drawdose (mcg) ÷ concentration (mcg/mL) = mL250 mcg ÷ 4,800 mcg/mL = 0.0521 mL
- Units to drawmL × units per mL = units0.0521 mL × 100 units/mL = 5.2 units
- Amount in each unitmcg per mL ÷ units per mL = mcg per unit4,800 mcg/mL ÷ 100 units/mL = 48 mcg per unit (0.048 mg)
- Doses in the vialvial (mcg) ÷ dose (mcg), rounded down12,000 mcg ÷ 250 mcg = 48 full doses
12 mg peptide with 2.5 mL bac water: units chart
Units to draw on a 1 mL U-100 syringe for common doses, calculated by this site. With this mix, the chart doses from 100 mcg to 2,000 mcg are easy to read and fit one 1 mL syringe. The smallest dose is under 2 units.
| Dose | Units (U-100) | Volume (mL) |
|---|---|---|
| 50 mcg | 1hard to measure | 0.0104 |
| 100 mcg | 2.1 | 0.0208 |
| 150 mcg | 3.1 | 0.0313 |
| 200 mcg | 4.2 | 0.0417 |
| 250 mcg | 5.2 | 0.0521 |
| 300 mcg | 6.3 | 0.0625 |
| 400 mcg | 8.3 | 0.0833 |
| 500 mcg | 10.4 | 0.1042 |
| 600 mcg | 12.5 | 0.125 |
| 750 mcg | 15.6 | 0.1563 |
| 1,000 mcg1 mg | 20.8 | 0.2083 |
| 1,250 mcg1.25 mg | 26 | 0.2604 |
| 1,500 mcg1.5 mg | 31.3 | 0.3125 |
| 2,000 mcg2 mg | 41.7 | 0.4167 |
Key numbers for this mix
- Peptide in the vial
- 12,000 mcg
- Concentration
- 4,800 mcg/mL
- Each unit on a U-100 syringe
- 48 mcg
- Each unit on a U-40 syringe
- 120 mcg
- Smallest easy-to-measure dose (2 units)
- 96 mcg
- Most that fits in a 1 mL syringe
- 4,800 mcg
Worked example: 500 mcg
- Convert the vial amount to mcg: 12 mg × 1,000 = 12,000 mcg
- Concentration: 12,000 mcg ÷ 2.5 mL = 4,800 mcg/mL (4.8 mg/mL)
- Volume to draw: 500 mcg ÷ 4,800 mcg/mL = 0.1042 mL
- Units to draw: 0.1042 mL × 100 units/mL = 10.4 units
- Amount in each unit: 4,800 mcg/mL ÷ 100 units/mL = 48 mcg per unit (0.048 mg)
- Doses in the vial: 12,000 mcg ÷ 500 mcg = 24 full doses
Draw 10.4 units on a U-100 syringe, just above the 10-unit mark. The same 500 mcg dose is 8.3 units with 2 mL of water and 12.5 units with 3 mL of water, compared with 10.4 units with 2.5 mL.
Frequently asked questions
What is the concentration of a 12 mg vial with 2.5 mL of water?
A 12 mg vial mixed with 2.5 mL of water holds 4,800 mcg per mL. Each unit on a U-100 syringe holds 48 mcg.
How many units is 500 mcg with a 12 mg vial and 2.5 mL of water?
It is 10.4 units on a U-100 syringe, which is 0.1042 mL of the mixed liquid.
What is the smallest dose you can measure well with a 12 mg vial and 2.5 mL of water?
About 96 mcg, which fills 2 units on a U-100 syringe. Smaller amounts are hard to read; a vial mixed with more water spreads them over more units.
What is the largest dose that fits a 1 mL syringe with a 12 mg vial and 2.5 mL of water?
4,800 mcg, which fills all 100 units of a 1 mL U-100 syringe. Larger doses need more than one draw or a stronger mix.
How many doses does a 12 mg vial with 2.5 mL of water give?
Divide 12,000 mcg by your dose and round down: 24 full doses of 500 mcg, or 20 of 600 mcg.
Nearby vial and water combinations
- Less water: 12 mg + 2 mL
- More water: 12 mg + 3 mL
- Smaller vial: 10 mg + 2.5 mL
- Larger vial: 15 mg + 2.5 mL
See all reconstitution charts, or use the peptide calculator for any other vial, water or dose. For the reasoning behind these numbers, read Peptide Reconstitution Formula, Explained Step by Step.