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Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity.
About This Calculator
The National Academies recommend about 3.7 liters (125 oz) daily for men and 2.7 liters (91 oz) for women — including water in food (which accounts for 20% of intake). Hydration needs increase significantly with exercise and hot weather. Urine color (pale yellow = well-hydrated) is a reliable gauge.