Daily Water Intake Calculator
Find out how much water to drink each day based on your weight and activity level
Enter your body weight and daily activity level, and this calculator tells you how much water to drink each day in milliliters, liters, and number of cups. It's useful if you're dieting or just trying to stay on top of your health and want a hydration target that actually fits your body. Every calculation runs instantly in your browser, so nothing you type is sent to a server.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Enter your current body weight in kilograms
- Choose your daily activity level: light, moderate, or intense
- See your recommended water intake in ml and liters, plus the number of 250 ml cups it works out to
FAQ
- How is the recommended water intake calculated?
- The baseline is 30 ml per kilogram of body weight, with 300 ml added for moderate activity and 600 ml added for intense activity.
- How is the number of cups determined?
- The total intake in ml is divided by 250 ml per cup and rounded up to the nearest whole cup.
- Is my weight saved anywhere?
- No. Nothing is stored, and every calculation happens entirely inside your browser.