💧 Water Intake Calculator
Find how much water you should drink daily based on your weight, activity, and climate.
Recommended Daily Water Intake
— L
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Glasses (250ml)
0
Bottles (500ml)
0
Cups (240ml)
0
How This Is Calculated
The baseline uses a common wellness guideline of about 33ml of water per kilogram of body weight. We then add extra for activity level (sweat loss during exercise) and hot or humid climates (increased fluid loss). This gives a practical daily target, not a strict medical prescription.
If you have a kidney, heart, or other condition that affects fluid intake, follow your doctor's guidance instead of a general calculator.
Who Uses This Tool?
- Anyone building a simple daily hydration habit
- Athletes and gym-goers adjusting intake around training days
- People in hot climates trying to avoid dehydration
- Anyone who just wants a quick, personalized daily target
Not exactly — 8 glasses (about 2 liters) is a rough average. Actual needs vary a lot based on body weight, activity level, and climate, which is why this calculator personalizes the number.
This target is for plain drinking water specifically. Food and other beverages also contribute to daily hydration, so your total fluid intake from all sources will typically be a bit higher.
Yes, drinking far more than your body needs in a short time can be harmful. This calculator gives a sensible daily target — spread it across the day rather than drinking it all at once.
No. All calculations happen instantly in your browser — nothing you enter is stored or shared.