When eating habits are salty, exercise is relatively large, sweating is relatively high, or the ambient temperature is relatively high, the demand for water will increase. At this time, you often need to drink more water, 2000 ~ 3000 ml or more.
When there is more water in the diet, less activity in a day, or when the ambient temperature is suitable and sweating is less, the human body's demand for water will be reduced.
So there is no uniform answer.