How Much Water Should I be Drinking?

The National Academies of Sciences, Engineering and Medicine (USA) released a report in 2004 stating that an average male needs 3.7 litres per day, while the average female requires 2.7 litres. Depending on how healthy your diet is, about 20-30% of that fluid intake will be derived from food, leaving roughly 3 litres required for men and around 2 litres for women.

Obviously, these requirements will change given certain conditions.