How Much Water Should You Drink?
A common starting point is about 35 ml of water per kilogram of body weight, with extra for exercise, hot weather, pregnancy and breastfeeding. Enter your weight and details and see your daily target as litres, glasses and fluid ounces.
What you can do
- Daily water in litres or fluid ounces, and the number of 250 ml glasses.
- Adjusts for time you exercise, hot or humid weather, pregnancy and breastfeeding.
- An hourly target and a clear breakdown of how the total was reached.
Good to know
- Food provides about 20% of your fluid, and tea, coffee and soups also count.
- People with kidney, heart or liver conditions should follow their doctor’s advice on fluids.
- Your measurements are saved only in your browser so the other health calculators remember them, and are never sent anywhere.