Calculators
Every calculator here works the same way round: you give the quantity you want per draw, and it solves backwards for how much bacteriostatic water to add. The water volume is the answer, not the question.
Blends
Why solve for the water
Most calculators ask you how much water you added and then tell you how many units that works out to — often a number like 6.4 units, which no syringe can be read to. Because the water volume is yours to choose before you mix, it is the variable worth optimising. We enumerate every printed mark on your syringe, keep the ones that stay inside the vial's capacity and every component's solubility ceiling, and prefer the one that lands on a line you can see.
Only three blends are live so far. More compounds are added as we find sourced solubility and composition data for them — never before.