 [ Symptoms ] how to judge a person wisely [ Disease ] there are no recommendations of fluid by weight it is generally accepted that drinking to thirst should be adequate unless you have certain medical conditions participate in intense or prolonged exercise or live in hot climates the institute of medicine does have general fluid guidelines    11 or more cups per day for women and 15 or more for men this includes fluid from food and beverages even caffeinated drinks like coffee see this article for more information