Daily Water Intake Calculator
Find how much water to drink based on weight and activity
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Enter your current weight and daily activity level to see how much water you should drink each day, shown in milliliters, liters, and cups. It's handy for anyone tracking hydration goals for fitness or general health, and everything is calculated instantly in your browser with nothing sent to a server.
How to use
- Enter your current weight in kilograms
- Select your daily activity level (light, moderate, or heavy)
- Check your recommended water intake in ml/L and the equivalent number of 250ml cups
FAQ
- How is the recommended water intake calculated?
- It uses 30ml per kilogram of body weight as a base, then adds 300ml for moderate activity or 600ml for heavy activity.
- How is the number of cups determined?
- Your total intake in ml is divided by 250ml per cup and rounded up to the nearest whole cup.
- Is my weight data stored anywhere?
- No, nothing is saved or sent anywhere — all calculations happen locally in your browser.