Water Intake Calculator
Estimate how many liters of water you should drink today based on your weight and activity.
Recommended daily intake
2.5 L
≈ 10 glasses of 240 ml
Why hydration matters
Water regulates body temperature, lubricates joints, and helps transport nutrients. Needs increase with exercise, heat and altitude, which is why this calculator adds extra for activity and weather.
Frequently asked questions
How is the daily water goal calculated?
This tool uses the common guideline of about 35 ml of water per kilogram of body weight, then adds extra for exercise minutes and hot weather.
Does coffee or tea count towards water intake?
Non-alcoholic beverages like coffee, tea and juice do contribute some fluid, but plain water remains the best source since it has no added sugar or caffeine.
Is this the same for everyone?
Individual needs vary with health conditions, pregnancy, breastfeeding and medications, so this estimate is a general guideline, not medical advice.
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