Household alcohol to water ratio disinfection mainly depends on the concentration of household alcohol, usually with alcohol is 75% of medical alcohol, can be directly skin disinfection and surface disinfection of goods, its no need to add water. If the research alcohol is used, let’s say the concentration is above 95%, it is used for fuel, usually not directly as disinfection, it needs to be mixed with water. It can be calculated according to the formula, according to the concentration of 95:75, so as long as the simple calculation can be done to complete the results and process of watering ratio.