One medium orange provides four ounces (or a half cup) of water. Roughly 60-70% of the human body is made of water, and it’s required for every bodily process. According to the Institute of Medicine, women 19 and over need 2.7 liters of total fluid per day (about 11 8-oz cups) and men need 3.7 (about 15 8-oz cups). But that’s total fluid, not just beverages. Foods can provide 20% of your daily fluid needs, and water-rich foods like oranges contribute even more to the daily requirement. Consuming enough daily fluid helps support mental and physical energy, improve circulation, optimize organ function, flush out waste, and maximize metabolism.