Water Intake Calculator
Estimate how much water you should drink per day based on your weight and activity.
Result
Daily water (litres)
2.66
Glasses (250 ml)
11
How it works
≈ 33 ml per kg of body weight + activity bonus
A general guideline based on body weight and activity. Needs vary with climate, health and diet — it's an estimate, not medical advice.
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Frequently asked questions
How much water should I drink per day?
A common guideline is about 30–35 ml per kg of body weight, adjusted for activity and climate. This calculator estimates it from your weight.
Do coffee and tea count toward my water intake?
Yes, most beverages contribute to hydration, but plain water is best. Increase your intake during exercise, hot weather, or illness.
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