Answer: There is some debate about the answer to this question, but the most common medical opinion is that you should drink about 64 ounces of water per day. This aides in hydration, weight management, digestion, and general health. If you are not used to drinking this much water, you will find that you have to use the bathroom much more often at first. After a time, usually a week or two, your body begins to adapt to the new water intake level and deals with it more consistently.