Eight standard glasses of water are equivalent to nearly two liters of liquid. Generally, the size of a standard glass of water is 8 ounces. A liter is 33.814 fluid ounces.
Many different health and fitness sources state drinking eight glasses or two liters of water each day is a good choice for overall health. Understanding that these two measurements are nearly the same can help eliminate confusion. In addition, it is important to understand how much water you're consuming in liters or ounces rather than focusing on how many glasses you drink as each container you use may be a different size.