Water Intake Calculator
Daily water intake based on weight and activity level.
Daily hydration needs depend on body weight, climate, and activity. This calculator estimates a starting point in liters and cups so you can track toward a realistic goal.
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Frequently Asked Questions
A common guideline is 30–35ml per kg of body weight. Active people need more. This calculator adjusts for your weight and activity level.
Moderate caffeine intake contributes to hydration. However, plain water is best for meeting your daily fluid needs.
Select a higher activity level. You'll need more water to replace fluids lost through sweat. Drink before, during, and after exercise.
Yes. Select a higher activity level or add extra water around workouts to replace sweat losses.