How Much Water Are You Supposed?

The U.S. National Academies of Sciences, Engineering, and Medicine determined that an adequate daily fluid intake is: About 15.5 cups (3.7 liters) of fluids a day for men. About 11.5 cups (2.7 liters) of fluids a day for women.

How much water should you drink based on your weight?

“In general, you should try to drink between half an ounce and an ounce of water for each pound you weigh, every day.” For example, if you weigh 150 pounds, that would be 75 to 150 ounces of water a day.

Is 64 oz of water a day enough?

If you feel adequately hydrated on 64 ounces of water each day, that's great. If you feel overly hydrated (clear pee and very frequent urination), cut back slightly. If you feel dehydrated (dark pee, headaches, infrequent urination), eight glasses may not be enough for you.