Water Intake Calculator
A general estimate of daily water intake — actual needs vary by climate, health and activity.
—Liters / day
—Cups (250 ml) / day
How it's calculated
Uses a common rule-of-thumb estimate of 35 ml per kg of body weight, plus roughly 500 ml for every 30 minutes of exercise. This is a general guideline, not medical advice — consult a doctor for guidance specific to any health condition.