Enter a vial size, bacteriostatic water volume, and target dose to get the concentration and syringe units for the injectable vial. Presets load the Spyro catalog values.
U-100 syringe: 100 units = 1.0 mL. Injection vials hold up to ~3 mL of BAC water. Always confirm against the vial label.
Pre-reconstituted pen vials ship at 3 mL — enter 3 as the BAC volume to match them. 3 mL is exactly 300 units, so per-unit = vial mg ÷ 300 × 1000 mcg. See bacteriostatic water.