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Daily Water Intake Calculator

Calculate exactly how much water you should drink per day based on your weight and activity level. Stay properly hydrated with a personalized daily water intake target.

How to Use Daily Water Intake Calculator

Enter your weight

Input your body weight in kg or lbs.

Select your activity level

Choose your daily activity level from sedentary to very active.

Get your daily water goal

See your personalized daily water intake recommendation in litres and glasses.

Frequently Asked Questions

How much water should I drink per day?▼

General guidelines suggest 2-3 litres (8-12 cups) for most adults, but your exact needs depend on your body weight, activity level, and climate.

Does coffee and tea count towards water intake?▼

Yes, all beverages contribute to hydration. However, caffeinated drinks have a mild diuretic effect, so plain water should still be your primary source.

How do I know if I'm drinking enough water?▼

The easiest sign is urine color — pale yellow indicates good hydration. Dark yellow means you should drink more. Thirst is also a reliable signal.

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