How long does it take one liter of water to pass through the kidneys?

The time it takes for one liter of water to pass through the kidneys varies based on several factors, including hydration levels, kidney function, and individual physiology. On average, the kidneys filter about 120-150 quarts of blood per day, producing roughly 1 to 2 quarts of urine. Therefore, it can take several hours for one liter of water to be processed and filtered through the kidneys before being excreted. However, this process can be influenced by hydration status and overall health.