20 mg vial + 2.5 mL bacteriostatic water: units chart
A 20 mg vial mixed with 2.5 mL of bacteriostatic water holds 8,000 mcg per mL. This is a middle-strength mix: each unit holds 80 mcg, so most doses in the table land between 2 and 100 units on a 1 mL syringe.
Units to draw
3.1units
Draw 3.1 units on a U-100 syringe, between the 2- and 4-unit marks, closer to 4.
- Dose
- 250 mcg (0.25 mg)
- Volume
- 0.031 mL
- Concentration
- 8,000 mcg/mL (8 mg/mL)
- Per unit
- 80 mcg (0.08 mg)
- Full doses in vial
- 80
Show the math
- Convert the vial amount to mcgmg × 1,000 = mcg20 mg × 1,000 = 20,000 mcg
- Convert the dose to mcgmg × 1,000 = mcg0.25 mg × 1,000 = 250 mcg
- Concentrationvial (mcg) ÷ water (mL) = mcg per mL20,000 mcg ÷ 2.5 mL = 8,000 mcg/mL (8 mg/mL)
- Volume to drawdose (mcg) ÷ concentration (mcg/mL) = mL250 mcg ÷ 8,000 mcg/mL = 0.0313 mL
- Units to drawmL × units per mL = units0.0313 mL × 100 units/mL = 3.1 units
- Amount in each unitmcg per mL ÷ units per mL = mcg per unit8,000 mcg/mL ÷ 100 units/mL = 80 mcg per unit (0.08 mg)
- Doses in the vialvial (mcg) ÷ dose (mcg), rounded down20,000 mcg ÷ 250 mcg = 80 full doses
20 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 200 mcg to 2,000 mcg are easy to read and fit one 1 mL syringe. The 3 smallest doses are under 2 units.
| Dose | Units (U-100) | Volume (mL) |
|---|---|---|
| 50 mcg | 0.6hard to measure | 0.0063 |
| 100 mcg | 1.3hard to measure | 0.0125 |
| 150 mcg | 1.9hard to measure | 0.0188 |
| 200 mcg | 2.5 | 0.025 |
| 250 mcg | 3.1 | 0.0313 |
| 300 mcg | 3.8 | 0.0375 |
| 400 mcg | 5 | 0.05 |
| 500 mcg | 6.3 | 0.0625 |
| 600 mcg | 7.5 | 0.075 |
| 750 mcg | 9.4 | 0.0938 |
| 1,000 mcg1 mg | 12.5 | 0.125 |
| 1,250 mcg1.25 mg | 15.6 | 0.1563 |
| 1,500 mcg1.5 mg | 18.8 | 0.1875 |
| 2,000 mcg2 mg | 25 | 0.25 |
Key numbers for this mix
- Peptide in the vial
- 20,000 mcg
- Concentration
- 8,000 mcg/mL
- Each unit on a U-100 syringe
- 80 mcg
- Each unit on a U-40 syringe
- 200 mcg
- Smallest easy-to-measure dose (2 units)
- 160 mcg
- Most that fits in a 1 mL syringe
- 8,000 mcg
Worked example: 750 mcg
- Convert the vial amount to mcg: 20 mg × 1,000 = 20,000 mcg
- Concentration: 20,000 mcg ÷ 2.5 mL = 8,000 mcg/mL (8 mg/mL)
- Volume to draw: 750 mcg ÷ 8,000 mcg/mL = 0.0938 mL
- Units to draw: 0.0938 mL × 100 units/mL = 9.4 units
- Amount in each unit: 8,000 mcg/mL ÷ 100 units/mL = 80 mcg per unit (0.08 mg)
- Doses in the vial: 20,000 mcg ÷ 750 mcg = 26 full doses
Draw 9.4 units on a U-100 syringe, between the 8- and 10-unit marks, closer to 10. The same 750 mcg dose is 7.5 units with 2 mL of water and 11.3 units with 3 mL of water, compared with 9.4 units with 2.5 mL.
Frequently asked questions
What is the concentration of a 20 mg vial with 2.5 mL of water?
A 20 mg vial mixed with 2.5 mL of water holds 8,000 mcg per mL. Each unit on a U-100 syringe holds 80 mcg.
How many units is 750 mcg with a 20 mg vial and 2.5 mL of water?
It is 9.4 units on a U-100 syringe, which is 0.0938 mL of the mixed liquid.
What is the smallest dose you can measure well with a 20 mg vial and 2.5 mL of water?
About 160 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 20 mg vial and 2.5 mL of water?
8,000 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 20 mg vial with 2.5 mL of water give?
Divide 20,000 mcg by your dose and round down: 26 full doses of 750 mcg, or 20 of 1,000 mcg.
Nearby vial and water combinations
- Less water: 20 mg + 2 mL
- More water: 20 mg + 3 mL
- Smaller vial: 15 mg + 2.5 mL
- Larger vial: 24 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.