Daily Water Intake Calculator
Calculate your recommended daily water intake based on body weight and activity level.
The Importance of Hydration
Water makes up about 60% of the human body and is essential for virtually every bodily function. Proper hydration improves cognitive function, physical performance, and overall health. Dehydration of even 1-2% can impair concentration and physical performance. Individual needs vary based on body size, activity level, climate, and health status. Thirst is not always a reliable indicator — by the time you feel thirsty, you may already be mildly dehydrated.
Frequently Asked Questions
Does coffee count toward daily water intake?
Yes, caffeinated beverages contribute to hydration, though they have a mild diuretic effect. Water, herbal teas, and water-rich foods all count.
Can you drink too much water?
Yes, overhydration (hyponatremia) can occur but is rare. Stick to the recommended amount and drink more during intense exercise or hot weather.