The recommended daily water intake varies but generally aligns with around 8 to 13 cups (about 2 to 3.7 liters) depending on factors like gender, activity level, and climate. For men, about 13 cups (3.7 liters) of fluids daily is suggested, and for women, about 9 to 11.5 cups (2.7 to 2.9 liters). The commonly heard advice to drink eight 8-ounce glasses of water per day (about 2 liters) is a reasonable and easy-to-remember guideline but individual needs may differ. Factors like exercise, hot weather, health conditions, pregnancy, and breastfeeding can increase your fluid needs. Additionally, about 20% of fluid intake usually comes from food, with the rest from drinks.