Water Intake Calculator

A common consumer rule of thumb is about 35 millilitres of water per kilogram of body weight. At 68 kg that is about 2.4 litres a day. Heat in Nagpur, a long run, and some medicines all change the need. This is not medical advice and not a prescription for people with kidney or heart disease, who must follow a clinician.

A screening number, not a diagnosis

Office AC in Gurugram dries people out; monsoon humidity in Kolkata does the opposite. A single litre-count still helps a healthy adult remember to keep a bottle. IndiaKit uses 35 ml/kg so the article is not another copy of “drink eight glasses.”

The estimate we use

Litres = weight × 0.035. Default 68 kg → 2.4 litres. Tea, dal water and fruit count as fluid for many dietitians; this page does not split them.

ICMR / NIN dietary guidance for India discusses water in a broader diet context. This 35 ml/kg rule is a consumer heuristic, not an ICMR table.

If a nephrologist set a fluid restriction, obey that, not this calculator.

68 kg desk worker in Nagpur in May

A 68 kg analyst in Nagpur types the default weight and sees 2.4 litres. In a 45°C week he drinks more and adds electrolytes as his doctor already suggested. The page did not green-light unlimited water.

See a clinician if a number worries you

Not medical advice. 35 ml/kg is a heuristic. Heart failure, kidney disease, hyponatremia risk, and infants are out of scope. Consult a registered medical practitioner.

Common questions

Do eight glasses equal 2.4 litres?

An “8 × 250 ml” slogan is 2 litres, close to this 68 kg result. Glass size is not standard in Indian homes. Use litres on the bottle mark.

Should I drink extra in Chennai humidity?

Sweat rates vary. Thirst, urine colour and a clinician’s advice beat a website. This tool does not add a climate factor.

Can I count filter coffee?

Caffeinated drinks still contribute water for many healthy adults, with caveats. If you have reflux or pregnancy-related advice from a doctor, follow that.