1 mg vial + 3 mL bacteriostatic water: units chart
A 1 mg vial mixed with 3 mL of bacteriostatic water holds 333.33 mcg per mL. This is a dilute mix: each unit holds only 3.33 mcg, so larger doses take up many units and may not fit a 1 mL syringe. Less water would make them smaller.
Units to draw
75units
Draw 75 units on a U-100 syringe, halfway between the 74- and 76-unit marks.
- Dose
- 250 mcg (0.25 mg)
- Volume
- 0.75 mL
- Concentration
- 333.33 mcg/mL (0.33333 mg/mL)
- Per unit
- 3.33 mcg (0.00333 mg)
- Full doses in vial
- 4
Show the math
- Convert the vial amount to mcgmg × 1,000 = mcg1 mg × 1,000 = 1,000 mcg
- Convert the dose to mcgmg × 1,000 = mcg0.25 mg × 1,000 = 250 mcg
- Concentrationvial (mcg) ÷ water (mL) = mcg per mL1,000 mcg ÷ 3 mL = 333.33 mcg/mL (0.33333 mg/mL)
- Volume to drawdose (mcg) ÷ concentration (mcg/mL) = mL250 mcg ÷ 333.33 mcg/mL = 0.75 mL
- Units to drawmL × units per mL = units0.75 mL × 100 units/mL = 75 units
- Amount in each unitmcg per mL ÷ units per mL = mcg per unit333.33 mcg/mL ÷ 100 units/mL = 3.33 mcg per unit (0.00333 mg)
- Doses in the vialvial (mcg) ÷ dose (mcg), rounded down1,000 mcg ÷ 250 mcg = 4 full doses
1 mg peptide with 3 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 50 mcg to 300 mcg are easy to read and fit one 1 mL syringe. The 5 largest doses need more than 1 mL.
| Dose | Units (U-100) | Volume (mL) |
|---|---|---|
| 50 mcg | 15 | 0.15 |
| 100 mcg | 30 | 0.3 |
| 150 mcg | 45 | 0.45 |
| 200 mcg | 60 | 0.6 |
| 250 mcg | 75 | 0.75 |
| 300 mcg | 90 | 0.9 |
| 400 mcg | 120over 1 mL | 1.2 |
| 500 mcg | 150over 1 mL | 1.5 |
| 600 mcg | 180over 1 mL | 1.8 |
| 750 mcg | 225over 1 mL | 2.25 |
| 1,000 mcg1 mg | 300over 1 mL | 3 |
Key numbers for this mix
- Peptide in the vial
- 1,000 mcg
- Concentration
- 333.33 mcg/mL
- Each unit on a U-100 syringe
- 3.33 mcg
- Each unit on a U-40 syringe
- 8.33 mcg
- Smallest easy-to-measure dose (2 units)
- 6.67 mcg
- Most that fits in a 1 mL syringe
- 333.33 mcg
Worked example: 50 mcg
- Convert the vial amount to mcg: 1 mg × 1,000 = 1,000 mcg
- Concentration: 1,000 mcg ÷ 3 mL = 333.33 mcg/mL (0.33333 mg/mL)
- Volume to draw: 50 mcg ÷ 333.33 mcg/mL = 0.15 mL
- Units to draw: 0.15 mL × 100 units/mL = 15 units
- Amount in each unit: 333.33 mcg/mL ÷ 100 units/mL = 3.33 mcg per unit (0.00333 mg)
- Doses in the vial: 1,000 mcg ÷ 50 mcg = 20 full doses
Draw 15 units on a U-100 syringe, halfway between the 14- and 16-unit marks. The same 50 mcg dose is 12.5 units with 2.5 mL of water, compared with 15 units with 3 mL.
Frequently asked questions
What is the concentration of a 1 mg vial with 3 mL of water?
A 1 mg vial mixed with 3 mL of water holds 333.33 mcg per mL. Each unit on a U-100 syringe holds 3.33 mcg.
How many units is 50 mcg with a 1 mg vial and 3 mL of water?
It is 15 units on a U-100 syringe, which is 0.15 mL of the mixed liquid.
What is the smallest dose you can measure well with a 1 mg vial and 3 mL of water?
About 6.67 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 1 mg vial and 3 mL of water?
333.33 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 1 mg vial with 3 mL of water give?
Divide 1,000 mcg by your dose and round down: 20 full doses of 50 mcg, or 10 of 100 mcg.
Nearby vial and water combinations
See all reconstitution charts, or use the peptide calculator for any other vial, water or dose. For the reasoning behind these numbers, read How Much Bacteriostatic Water to Add to a Vial.