Water Intake Calculator
Estimate daily water needs from weight and activity. A general guide, not medical advice.
Daily water
2.66 L
Glasses (250 ml)
11
How it works
- Enter your values.
- Results update instantly.
- Copy or use the result.
FAQ
How much water should I drink a day?
A common guideline is about 30–35 ml per kg of body weight, plus extra when exercising or in hot weather.
Does food count?
Yes. Fruit, vegetables, soups and other drinks contribute to hydration.
Who should ask a doctor?
People with kidney, heart or other conditions, and pregnant or breastfeeding women, should follow medical advice.