How much water should I drink a day?

A common guide is about 33 ml of water per kilogram of body weight (roughly 0.5 oz per pound), plus extra for exercise and hot weather. For many adults that lands around 2 to 3 litres a day, including water from food and other drinks.

Does coffee or tea count toward water intake?

Yes — despite the caffeine, coffee and tea are mostly water and count toward your daily fluid intake. Food, especially fruit and vegetables, also contributes a meaningful amount.

Water intake calculator

Find how much water to drink each day, based on your body weight, exercise and climate.

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How much water do you really need?

A common guideline is about 33 ml of water per kilogram of body weight, plus roughly 350 ml for every 30 minutes of exercise and about 10% more in hot weather. Food and other drinks count toward the total.

Tips to stay hydrated

Start the day with a glass of water, keep a bottle within reach, and drink around meals and workouts. Pale-yellow urine is a good sign you're well hydrated.

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