The general daily water intake recommendations in ounces are as follows:
- Adult men (19 years and older): about 104 to 130 ounces per day (approximately 13 cups to 15.5 cups)
- Adult women (19 years and older): about 72 to 95 ounces per day (approximately 9 cups to 11.5 cups)
- Pregnant women: about 80 ounces (10 cups) per day
- Breastfeeding women: about 104 ounces (13 cups) per day
- Children’s needs vary by age, for example:
- Ages 4-8: about 40 ounces (5 cups)
* Ages 9-13: about 56-64 ounces (7-8 cups)
* Ages 14-18: about 64-88 ounces (8-11 cups)
These amounts refer to total fluid intake from all beverages and foods containing water, not just plain water alone
. The classic "8 glasses of 8 ounces" rule (64 ounces) is a reasonable baseline for many but is not scientifically precise for everyone. Individual needs vary widely depending on factors such as body size, activity level, climate, and health status
. A practical guideline some use is to drink approximately 0.5 to 1 ounce of water per pound of body weight daily. For example, a 175-pound person might aim for 90 to 175 ounces
. Ultimately, thirst is a good indicator of hydration needs, and fluid intake should be adjusted for exercise, heat exposure, and other conditions that increase water loss
. In summary, most adults should aim for roughly 72 to 130 ounces of total fluids daily, with adjustments based on personal factors.
