For research and educational purposes only. Not medical advice.
BAC water calculator
Calculate how many milliliters of bacteriostatic water to add to a peptide vial to reach a target concentration.
What this calculator returns
- The milliliters of bacteriostatic water to add for a chosen target concentration.
- The resulting concentration so you can sanity-check against a chosen draw volume.
- A measurement-floor warning when the requested concentration would require less than 0.5 ml of BAC water.
Formula and example
BAC water volume equals vial mass in micrograms divided by the target concentration in mcg/ml.
This is the inverse of the peptide reconstitution calculator: choose concentration first, then solve for diluent volume.
Worked example: A 5 mg vial contains 5,000 mcg. To land at 2,500 mcg/ml, divide 5,000 by 2,500 and add 2 ml of BAC water.
Warnings and boundaries
- Very small BAC volumes are difficult to measure accurately.
- The result does not validate sterility, diluent compatibility, or storage stability.
- Confirm the actual diluent and window with the source or pharmacy.