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Water Intake Calculator
Get your personalised daily water target in litres and glasses.
kg
min
Daily Water Intake
2.80 litres
Approx. 11 glasses of 250 ml
Millilitres
2800 ml
Glasses
11
Bottles (500 ml)
6
How Daily Water Need Is Estimated
A common rule is 35 ml per kg of body weight. Add ~350 ml per 30 minutes of exercise, and multiply by 1.15 in hot climates. Most adults land between 2–4 L per day.
Frequently Asked Questions
Is 8 glasses a day enough?
It's a rough average for a 60 kg sedentary adult. Actual need varies with weight, climate, and exercise. This calculator personalises it.
How much water is too much?
Drinking over 1 litre per hour for several hours can cause hyponatremia (low sodium). For most people, 3–4 L spread through the day is safe.
Does coffee/tea count?
Yes. Mild diuretic effects are offset by the water content. Plain water is still ideal because it has no calories or caffeine.
Do I need more water in summer?
Yes — add 10–15% for hot or humid climates. Hydrate especially before sun exposure and workouts.