I get kidney stones, how much water should i drink a day? right now i drink 6-8 litres a day (500ml every hour)

Keep it up,,,: If you can sustain it, keep this amount up. This is actually more than normal as the average intake of water is about 6 to 8 glasses per day. You might find you're drinking too much so it depends on how you feel with it, like if you're going to the bathroom too often, or if your dr. Says you still have stones you might want to drink less or more. You can also see your dr. For a checkup.

No strict guidelines: Nobody's done a study, but if you drink enough water to keep your urine light-colored, it's probably plenty.