How it works
A practical rule is about 35 ml of water per kg of body weight, plus roughly 500 ml for every 30 minutes of exercise. Indian summers and heavy sweating increase your needs further.
Frequently asked questions
Does tea or coffee count towards water intake?
Mostly yes — but plain water, buttermilk and coconut water are better choices.
How do I know I am hydrated?
Pale-yellow urine and rarely feeling thirsty are good signs.
These calculators give estimates for general guidance only and are not medical advice. Please consult a doctor for health concerns.