This calculator is helpful in accurately determining how much water is required to dilute a given volume of alcoholic spirits at a known strength down to a desired strength. Any standard values can be used for the calculations just as long as they are consistent. For example, quarts, liters, ounces, or milliliters, as well as %ABV or proof can be used. The calculators default values are in milliliters and proof. Also note that the calculator labeling was worded so as to be a reminder that alcohol should be added to water, not water added to alcohol, to help reduce the possibility of clouding the resulting mixture.