Water Intake Calculator
Estimate how much water to drink each day from your body weight, how long you exercise and whether you live in a hot climate.
How it works
- 1
Enter your weight
In kilograms.
- 2
Add exercise and climate
Minutes of exercise per day and a hot or temperate climate.
- 3
See your daily goal
Liters, 250 ml glasses and fluid ounces.
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Frequently asked questions
Yes. Moderate amounts of coffee and tea contribute to daily fluid intake.
How much water you really need
A common guideline is around 35 ml of water per kilogram of body weight, plus roughly 350 ml for every 30 minutes of exercise and an extra half liter in hot or humid weather. Food provides part of this, especially fruit, vegetables and soups.
Thirst and pale-yellow urine are good everyday signals. People with heart or kidney conditions may need to limit fluids, so they should follow their doctor’s advice.