Water Intake Calculator
Calculate your recommended daily water intake based on weight, activity, and climate.
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Daily Water Intake
2.9
litres / day
≈ 12 glasses (240ml each)
Progress Tracker
Hydration Tips
- • Drink 1–2 glasses on empty stomach every morning
- • Drink water 30 mins before meals, not during
- • Urine should be pale yellow — dark means dehydrated
- • Hot climate, illness, and exercise increase needs
Suggested Drinking Schedule
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About this tool
How to use Water Intake Calculator
- 1Enter your body weight in kg
- 2Select your activity level (sedentary to active)
- 3Choose your climate (normal, hot, or very hot)
- 4Toggle special conditions like pregnancy or breastfeeding
- 5View recommended daily water intake in litres and number of glasses
Frequently Asked Questions
How much water should I drink per day?
A common formula is 35ml per kg of body weight. For a 70kg person, that's 2.45 litres/day. Activity, climate, and health conditions increase this. The popular '8 glasses a day' rule is an approximation — actual needs vary.
Does tea and coffee count as water intake?
Yes and no. Water from tea, coffee, and other beverages counts toward hydration, but caffeine has a mild diuretic effect. Plain water is the best source. Fruits and vegetables also contribute to hydration.
What are signs of dehydration?
Early signs: dark yellow urine, thirst, fatigue, dry mouth. Moderate: headache, dizziness, reduced output. Aim for pale yellow urine as a sign of good hydration. In India's summer, increase intake significantly.
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