Water intake calculator
Enter your weight, exercise time and climate: the calculator estimates your daily water needs.
How much should you drink a day?
An adult needs about 1.5 to 2 litres of water a day, more with exercise or in hot weather. Clear urine is a good sign of hydration.
Frequently asked questions
How many litres of water a day?
About 1.5 to 2 litres for an adult, more with exercise or heat.
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