20 mg vial + 1 mL bacteriostatic water: units chart
A 20 mg vial mixed with 1 mL of bacteriostatic water holds 20,000 mcg per mL. This is a strong mix: each unit holds 200 mcg, so small doses take up only a few units and are harder to measure. More water would spread them out.
Units to draw
1.3units
Draw 1.3 units on a U-100 syringe, between the 0- and 2-unit marks, closer to 2.
Warning: At 1.3 units this dose is hard to measure. Add more water when you mix the vial so the dose fills at least 2 units.
- Dose
- 250 mcg (0.25 mg)
- Volume
- 0.013 mL
- Concentration
- 20,000 mcg/mL (20 mg/mL)
- Per unit
- 200 mcg (0.2 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 ÷ 1 mL = 20,000 mcg/mL (20 mg/mL)
- Volume to drawdose (mcg) ÷ concentration (mcg/mL) = mL250 mcg ÷ 20,000 mcg/mL = 0.0125 mL
- Units to drawmL × units per mL = units0.0125 mL × 100 units/mL = 1.3 units
- Amount in each unitmcg per mL ÷ units per mL = mcg per unit20,000 mcg/mL ÷ 100 units/mL = 200 mcg per unit (0.2 mg)
- Doses in the vialvial (mcg) ÷ dose (mcg), rounded down20,000 mcg ÷ 250 mcg = 80 full doses
20 mg peptide with 1 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 400 mcg to 2,000 mcg are easy to read and fit one 1 mL syringe. The 6 smallest doses are under 2 units.
| Dose | Units (U-100) | Volume (mL) |
|---|---|---|
| 50 mcg | 0.3hard to measure | 0.0025 |
| 100 mcg | 0.5hard to measure | 0.005 |
| 150 mcg | 0.8hard to measure | 0.0075 |
| 200 mcg | 1hard to measure | 0.01 |
| 250 mcg | 1.3hard to measure | 0.0125 |
| 300 mcg | 1.5hard to measure | 0.015 |
| 400 mcg | 2 | 0.02 |
| 500 mcg | 2.5 | 0.025 |
| 600 mcg | 3 | 0.03 |
| 750 mcg | 3.8 | 0.0375 |
| 1,000 mcg1 mg | 5 | 0.05 |
| 1,250 mcg1.25 mg | 6.3 | 0.0625 |
| 1,500 mcg1.5 mg | 7.5 | 0.075 |
| 2,000 mcg2 mg | 10 | 0.1 |
Key numbers for this mix
- Peptide in the vial
- 20,000 mcg
- Concentration
- 20,000 mcg/mL
- Each unit on a U-100 syringe
- 200 mcg
- Each unit on a U-40 syringe
- 500 mcg
- Smallest easy-to-measure dose (2 units)
- 400 mcg
- Most that fits in a 1 mL syringe
- 20,000 mcg
Worked example: 2,000 mcg
- Convert the vial amount to mcg: 20 mg × 1,000 = 20,000 mcg
- Concentration: 20,000 mcg ÷ 1 mL = 20,000 mcg/mL (20 mg/mL)
- Volume to draw: 2,000 mcg ÷ 20,000 mcg/mL = 0.1 mL
- Units to draw: 0.1 mL × 100 units/mL = 10 units
- Amount in each unit: 20,000 mcg/mL ÷ 100 units/mL = 200 mcg per unit (0.2 mg)
- Doses in the vial: 20,000 mcg ÷ 2,000 mcg = 10 full doses
Draw to the 10-unit mark on a U-100 syringe. The same 2,000 mcg dose is 15 units with 1.5 mL of water, compared with 10 units with 1 mL.
Frequently asked questions
What is the concentration of a 20 mg vial with 1 mL of water?
A 20 mg vial mixed with 1 mL of water holds 20,000 mcg per mL. Each unit on a U-100 syringe holds 200 mcg.
How many units is 2,000 mcg with a 20 mg vial and 1 mL of water?
It is 10 units on a U-100 syringe, which is 0.1 mL of the mixed liquid.
What is the smallest dose you can measure well with a 20 mg vial and 1 mL of water?
About 400 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 1 mL of water?
The whole vial fits: 20,000 mcg is 100 units on a U-100 syringe.
How many doses does a 20 mg vial with 1 mL of water give?
Divide 20,000 mcg by your dose and round down: 10 full doses of 2,000 mcg, or 50 of 400 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.