Don’t beat yourself up if you don’t drink the standard recommendation of eight 8-ounce glasses of water every day.
Many things factor into how many glasses you need, including your activity level as well as the amount of foods you eat that have a high water content.
Everyone has heard the advice, “Drink eight 8-ounce glasses of water a day.” That’s about 1.9 liters, which isn’t that different from the Institute of Medicine recommendations. Although the “8 by 8” rule isn’t supported by hard evidence, it remains popular because it’s easy to remember. Just keep in mind that the rule should be reframed as: “Drink eight 8-ounce glasses of fluid a day,” because all fluids count toward the daily total.