According to the National Academies of Sciences, Engineering, and Medicine, the daily recommended intake of water is: About 15.5 cups (3.7 liters) of fluids for men About 11.5 cups (2.7 liters) of fluids a day for women These recommendations cover fluids from water, other beverages, and food. So, to answer the question, 2 liters of water a day is just over 8 cups of water. This is the recommended daily intake for men, so women would need to drink slightly less than this amount. Of course, everyone is different and your individual water needs may vary depending on factors like exercise, climate, and overall health. But, as a general rule, 8 cups of water a day is a good target to aim for.