Water Intake Calculator
Estimate how much water to drink each day based on your body weight.
Daily water2,310ml
In litres2.31L
In cups (240 ml)9.6cups
A common guideline is about 33 ml of water per kilogram of body weight per day. At 70 kg that is 70 × 33 ≈ 2,310 ml — roughly 2.3 litres, or about 9–10 cups. Needs rise with heat, exercise and illness; food and other drinks also count toward your total.
Educational estimate only — not professional financial or medical advice.
Questions
How much water should I drink a day?
A common rule of thumb is roughly 33 ml per kilogram of body weight. For a 70 kg person that is about 2.3 litres, though needs vary with climate and activity.
Does coffee or food count?
Yes. Water in food, tea, coffee and other beverages all contribute to your daily total. The figure here is total fluid, not just plain water.