How much water do you need to drink every day to stay alive?



  1. 0 Votes

    The human body needs between 2.5-3 liters of water per day. Some of this is usually ingested in food. In high temperatures or with exercise, more water may be needed. Some people require more water due to their weight, medications, or other individual differences.

  2. 0 Votes

    In general, doctors recommend 8 to 9 cups a day. But there are various ways to calculate what amount you need. 

    • Replacement approach. The average urine output for adults is about 1.5 liters (6.3 cups) a day. You lose close to an additional liter (about 4 cups) of water a day through breathing, sweating and bowel movements. Food usually accounts for 20 percent of your total fluid intake, so if you consume 2 liters of water or other beverages a day (a little more than 8 cups) along with your normal diet, you will typically replace your lost fluids.
    • Eight 8-ounce glasses of water a day. Another approach to water intake is the “8 x 8 rule” — drink eight 8-ounce glasses of water a day (about 1.9 liters). The rule could also be stated, “Drink eight 8-ounce glasses of fluid a day,” as all fluids count toward the daily total. Although the approach really isn’t supported by scientific evidence, many people use this easy-to-remember rule as a guideline for how much water and other fluids to drink.
    • Dietary recommendations. The Institute of Medicine advises that men consume roughly 3 liters (about 13 cups) of total beverages a day and women consume 2.2 liters (about 9 cups) of total beverages a day.
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