A person is recommended to drink at least 8 ounce glass of water everyday, which is also known as 8*8 rules. But ‘How much water should i drink a day’ also depends on various other factors which are as follows:
If your diet includes spicy, sugary foods and caffeinated drinks, then you need to drink more water.
If you are living in a hot & humid area, then you need more water to stay hydrated.
If you are very active throughout the day & walk and stand a lot, then you need more water.