Laboratory calculator
40 mg vial BAC Water Calculator
Worked example
Worked example: a default of 2 mL gives 20 mg/mL in a 40 mg vial (40 mg / 2 mL). To reach another concentration, divide the vial mass by it: water volume = 40 mg / target concentration. Change the target concentration to recalculate.
BAC water calculator
- Bacteriostatic water to add
- 2 mL
- Resulting concentration
- 20 mg/mL
A desired concentration takes priority; leave it empty to use target amount and units instead.
How it works
Water volume = vial mass / target concentration: 40 mg / 20 mg/mL = 2 mL. The 2 mL shown is a default; change the target concentration to recalculate. Any volume above the 3 mL vial capacity is flagged.
Frequently asked questions
How much BAC water goes in a 40 mg vial for 20 mg/mL?
Divide the vial mass by the concentration you want: 40 mg / 20 mg/mL = 2 mL. A default of 2 mL gives 20 mg/mL; change the target concentration to recalculate.
Does 2 mL fit in a standard 3 mL vial?
Yes. 2 mL is within the 3 mL vial capacity used by default; the calculator flags any volume above it.
What water volume gives 1 mg/mL for a 40 mg vial?
40 mL (40 mg / 1 mg/mL), which exceeds the 3 mL vial capacity, so a higher concentration is needed.