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Water Intake Calculator

Calculate your recommended daily water intake.

kg

How to Calculate

Daily recommended water intake is calculated based on body weight. Basic formula: Weight (kg) × 33 ml Additional by activity level: • Light activity: no addition • Moderate activity (exercise 3–5×/week): +500 ml • High activity (daily exercise): +1,000 ml This is a general guideline and may vary with climate, health conditions, etc.

Example

Weight 70 kg, moderate activity Base intake = 70 × 33 = 2,310 ml Activity addition = +500 ml Total recommended = 2,810 ml (≈ 2.81 L) Approx. 11 glasses (250 ml each)

FAQ

Does coffee or tea count toward water intake?
Caffeinated beverages do contribute to hydration, but they also have a mild diuretic effect. Drinking plain water is best. Limit coffee to 2–3 cups per day.
Is drinking too much water dangerous?
Drinking an extremely large amount of water in a short time can cause hyponatremia. It is best to spread your water intake throughout the day.
Should I drink water even if I am not thirsty?
When you feel thirsty, you may already be mildly dehydrated. It is good to develop a habit of drinking water regularly.