This calculator determines the amount of sanitizer to be added to a volume of water to provide the correct PPM of active ingredient for an intended use. The four most common sanitizers used by small and medium-scale farms are selectable from a drop down menu (Sanidate 5.0, Tsunami, Vigorox, Germicidal Bleach) as are three most common labeled uses (wash water treatment, sanitizing, disinfecting). Users can provide custom information for a sanitizer or use not listed. The user provides the volume of the container they are mixing in. The calculator provides the appropriate dose for the target concentration of the use in a variety of units of measure. The user can email the results to themselves or others.