how many cups of water are you supposed to drink in a day
Rating Newest Oldest. 1  Usually 8-10 cups in the winter time, 11-14 in the summer. Source(s): my mother is a nutritionist (: Katherine Amelin Â· 4 years ago. 2  You're supposed to drink half or more of your body weight in ounces. For example, i weigh 163 pounds, so i need to drink at least 82 ounces of water a day. In cups... If i have a cup that holds 8 ounces of water, i would need to drink 11 of them. Your best bet would be to get a water bottle that has ounce markings on them and use that as a measurement. For instance, i carry around a water bottle the holds 75 ounces of water. I fill it up 3 times a day.