how much water glass you drink in day?

i drint morning 1 litre when i wake up then 2 glasses after break fact after that 2 glasses for every 2hours then 2 glasses after lunch after that 2 glasses for every 2 hours then 2 glasses after lunch 2 glasses = 300 milli litre totally 16 glass of water + 1litre in morning 16 * 0.3 = 4.8 litre so i am drinking around 6 litre of water a day I hope this is also suggested by nutricians