How much water should a person drink daily?

The amount of water a person should drink daily can vary based on factors like age, sex, activity level, climate, and overall health. A common guideline you might have heard is “8 glasses a day,” which roughly equals about 2 liters or half a gallon. While this is a simple and easy-to-remember recommendation, health experts suggest a more individualized approach. The U.S. National Academies of Sciences, Engineering, and Medicine recommends a total daily water intake (from all beverages and foods) of about 3.7 liters (125 ounces) for men and 2.7 liters (91 ounces) for women. This includes water obtained from food and other drinks, not just plain water. Since about 20% of our fluid intake typically comes from food, drinking around 2 to 3 liters of water per day is often sufficient for most people under normal conditions. Ultimately, the best indicator of hydration is your body’s signals—thirst and the color of your urine (pale yellow is ideal). If you are very active, live in a hot climate, or are pregnant or breastfeeding, your water needs will be higher. Listening to your body and drinking when thirsty, along with consuming water-rich foods like fruits and vegetables, will help you stay properly hydrated. If you have specific health conditions or concerns, consulting a healthcare professional for personalized advice is always a good idea.