About Water Intake Calculator
Daily fluid needs depend on body size, activity, climate, and health. This calculator uses a common rule of thumb: 33 ml per kg of body weight, plus 350 ml for every 30 minutes of exercise. The result is shown in litres and as 250 ml glasses. Part of your fluid intake comes from food and other drinks, and needs rise in hot weather. General estimate, not medical advice.
How to use Water Intake Calculator
- Fill in "Weight" and "Exercise per day".
- The result appears below and updates as you type.
- Copy the result with the copy button, or download it as a file where that is offered.
Questions about Water Intake Calculator
Do tea, coffee, and food count toward the total?
Yes. Most drinks and the water in food contribute to hydration, so the figure is total fluid and not only plain water. Thirst and pale yellow urine are practical signs that you are drinking enough.
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