The general recommendation for daily water intake in ounces is about 104 ounces (13 cups) for men and 72 ounces (9 cups) for women, according to the Institute of Medicine (IOM). This total includes fluids from all beverages and food. Children and pregnant or breastfeeding women have different needs—for example, pregnant women are recommended to drink about 80 ounces (10 cups) daily, and breastfeeding women about 104 ounces (13 cups) daily. Daily water needs can vary based on factors such as age, activity level, climate, and overall health. For physically active people or those in hot climates, higher intake is often necessary. The popular "eight 8-ounce glasses" rule is a simple guideline but not individualized enough for everyone. Here is a summary of daily water intake recommendations in ounces from beverages:
- Men (19+ years): ~104 oz (13 cups)
- Women (19+ years): ~72 oz (9 cups)
- Pregnant women: ~80 oz (10 cups)
- Breastfeeding women: ~104 oz (13 cups)
- Children (4–8 years): 40 oz (5 cups)
- Children (9–13 years): 56–64 oz (7–8 cups)
- Teens (14–18 years): 64–88 oz (8–11 cups)
These figures represent water from drinks alone, with total daily fluid intake including water from food as well.
