How Many Water Bottles Should I Drink A Day?

You should aim to drink about 8 to 13 cups (64 to 104 ounces) of water per day depending on your age, sex, and activity level. For healthy adult men, the recommendation is roughly 13 cups (104 ounces), and for healthy adult women, it's about 9 cups (72 ounces) daily. This amount includes all fluids consumed, including water from foods and other beverages.

If you are physically active, in hot climates, pregnant, or breastfeeding, your fluid needs increase, sometimes up to about 13 cups or more. The familiar advice of "8 glasses a day" (each glass 8 ounces) is a reasonable goal but can vary depending on individual factors such as body size, exercise, and health conditions.

A simple personalized guideline is to drink half your body weight in ounces of water daily—for example, a 150-pound person would drink about 75 ounces. Always listen to your thirst and adjust intake for sweat loss or illness.