Water Intake Calculator: how much water should I drink?
Get a daily water target based on your weight and how much you exercise.
For general information only, not medical advice. Speak to your GP, midwife or a health professional about your own health.
How it works
A common guide is about 30β35 ml per kg of body weight, plus around 0.5 litres for every 30 minutes of exercise.
The NHS suggests 6β8 glasses of fluid a day; tea, coffee and food all count towards it.
Frequently asked questions
Can you drink too much water?+
Yes, though it's rare. Drink to thirst and drink more in hot weather or when exercising.