Practical
Daily Water Intake Calculator
Personalised daily hydration goal based on weight and activity
💧Water Intake Calculator
Daily water intake requirements depend on body weight, activity level, climate, and diet. The old "8 glasses a day" (2 litres) rule lacks scientific basis. The European Food Safety Authority recommends 2.5L/day for men and 2.0L/day for women, including water from food (which contributes ~20%).
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Tip: You do not need to track water obsessively — thirst is a reliable indicator for most healthy adults. Drink when thirsty, and ensure urine is pale yellow rather than dark amber.
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