Water Intake Calculator

Daily water needs depend on body weight, activity level, and climate. A common guideline is 15.5 cups (3.7L) for men and 11.5 cups (2.7L) for women. Our calculator provides a personalized recommendation based on your specific weight and activity level.

Yes. Physical activity and sweating increase fluid loss, so you need more water to replace what you lose. The more intense your workout, the more hydration you need.

Yes, drinking excessive amounts in a short time can cause hyponatremia (water intoxication). However, this is rare. Following a personalized hydration plan makes it unlikely to happen.

Dark yellow urine, thirst, dry mouth, headaches, fatigue, and reduced exercise performance are common signs of dehydration. Pale yellow urine indicates good hydration.

Heavier individuals need more water because they have more body mass and higher metabolic rates. That's why personalized calculators are better than generic recommendations.

Yes. About 20% of daily water comes from water-rich foods like fruits and vegetables. Other beverages like tea, milk, and coffee also contribute, though plain water is best.

The formula is: Body weight (kg) × 35 ml = Daily water intake. Then adjust by activity level: Low (×1.0), Moderate (×1.2), High (×1.4).

Water regulates body temperature, transports nutrients, supports digestion, lubricates joints, improves brain function, and boosts energy and athletic performance.