Drinking enough water can have numerous benefits. One important factor, is that it can help boost the amount of calories you burn. According to studies, it can boost your metabolism by 24-30% over a period of 1-1.5 hours. This can amount to 96 additional calories burned if you drink 2 liters (67 oz) of water per day. The best time to drink water is half an hour before meals. One study showed that half a liter of water, 30 minutes before each meal, increased weight loss by 44%.