RedoseBacteriostatic water calculator
Want each dose to land on a clean number of units? This tells you exactly how much bacteriostatic water to add.
Want each dose to land on a clean number of units? This tells you how much bacteriostatic water to add to the vial.
About the bac water calculator
Most calculators work forwards from the water you added. This one works backwards: you decide how many units you want to draw for each dose, and it tells you how much bacteriostatic water to add so the math lands on that clean number.
It converts your target units to a volume, derives the concentration that dose-and-volume implies, and then divides the vial amount by that concentration to give the millilitres of water to add.
Drawing on a round number like 10 or 20 units reduces measuring error. After you reconstitute, the dose-to-units calculator confirms the draw, and the vial duration calculator shows how long the vial will last.
FAQ
How much bacteriostatic water do I add to a peptide vial?
Enter the units you want per dose, your vial size, and your dose. The calculator returns the exact millilitres of BAC water to add so each dose lands on that unit mark.
Why choose the units first?
Drawing to a clean line such as 10 or 20 units is far easier to measure accurately than an awkward figure like 13.5 units, which lowers dosing error over a multi-week protocol.
Can I add too much water?
You can, the vial only holds so much volume, and very dilute solutions make small doses hard to draw. If the calculator returns more water than the vial fits, lower your units-per-dose target.