Bacteriostatic Water for Injection, USP
How Much Bac Water Do You Need?
Vial & Reconstitution
Concentration
Per syringe unit
5 mg/mL
50 mcg/unit
Step 2
Desired dose
Important
Milligrams (mg) and micrograms (mcg) are not the same as insulin syringe units. Enter your amount above and the calculator works out the unit mark.
Draw syringe to
40
units
Draw to the 40 unit mark on a 1 mL insulin syringe.
Calculation details
- Draw to
- 40 units
- Injection volume
- 0.4 mL
- Milligrams
- 2 mg
- Micrograms
- 2000 mcg
- Doses / vial
- ~5
- Bac water used
- 2 mL
Bac water you need
Steri-Pep BAC Water 10ml, single vial
10 mL in total, $10.95 a vial. Covers your 2 mL with 8 mL to spare.
This tool does not recommend doses. It converts the numbers you enter into a volume and a syringe mark.
What concentration will you end up with?
The second calculator works the other way round: it takes the bac water you have already added and returns the concentration, plus what a given volume on the syringe contains.
Concentration
5 mg per mL
10 mg dissolved in 2 mL
In 0.5 mL
2.5 mg
What that volume on the barrel contains
This converts between milligrams, millilitres and concentration. It does not advise how much of anything to use.
How does the calculation work?
Concentration is milligrams divided by millilitres. A 10mg vial with 2mL of bac water added holds 5mg in every millilitre. Nothing more complicated is happening, and the calculator above is doing exactly that division.
What are the common combinations?
| Vial | Bac water added | Concentration |
|---|---|---|
| 2 mg | 1 mL | 2 mg per ml |
| 5 mg | 1 mL | 5 mg per ml |
| 5 mg | 2 mL | 2.5 mg per ml |
| 10 mg | 1 mL | 10 mg per ml |
| 10 mg | 2 mL | 5 mg per ml |
| 10 mg | 3 mL | 3.33 mg per ml |
| 15 mg | 3 mL | 5 mg per ml |
| 20 mg | 2 mL | 10 mg per ml |
| 30 mg | 3 mL | 10 mg per ml |
| 50 mg | 5 mL | 10 mg per ml |
How much bac water will you get through?
At 1mL to 3mL per vial, a 30mL vial covers roughly ten to thirty reconstitutions, and a 10mL vial covers three to ten. Both have to be used before the expiration date of the first puncture, so buy for what you will actually get through in a month.
How much bac water should you have on hand?
Run the calculator above for the vials you are actually working with, then buy the pack that covers it. Most people running several peptides land on a 30ml vial, and the 10 pack brings it down to the lowest per-vial price we post.
Frequently Asked Questions
- How do you calculate reconstitution concentration?
- Concentration equals the milligrams in the vial divided by the millilitres of bac water you add. A 10mg vial with 2mL added gives 5mg per mL. That one division is the whole calculation.
- How much bac water do you add to a 5mg vial?
- Adding 1mL to a 5mg vial gives 5mg per mL, and 2mL gives 2.5mg per mL. Both dissolve the same 5mg, so the choice is about how large you want the measured volumes to be.
- What does mg per mL mean on a syringe?
- Milligrams per millilitre is how much of the dissolved substance sits in each millilitre of liquid. At 5mg per mL, half a millilitre on the barrel contains 2.5mg.
- Does the calculator tell you how much to take?
- No. It converts between milligrams, millilitres and concentration and nothing else. How much of anything to use is a question for a qualified professional, not a calculator.
- Why do different people use different volumes for the same vial?
- Because the volume sets the concentration, and people pick concentrations that make their measurements easy to read. More diluent gives larger, easier volumes; less gives a longer-lasting vial.
Important notices
Bacteriostatic water for injection, USP sold on this site is supplied strictly for laboratory research use only. It is not a drug, not a dietary supplement, and not intended for human or veterinary use, diagnosis, treatment, or the prevention of any condition. It may not be administered to humans or animals. By ordering you confirm you are a qualified buyer purchasing for in vitro research conducted in a controlled laboratory environment.
