🧮 Calculators
Water Intake Calculator
How much water should you drink daily? Get a personalized target based on weight, activity, and climate. Includes hourly reminder schedule.
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Recommended daily water intake
Hourly Schedule (waking hours)
💡 Sip throughout the day. Do not chug large amounts at once.
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How it works
01
Enter Details
Weight, age, activity level, and climate.
02
See Target
Personalized daily water goal in liters or ounces.
03
Schedule
Hourly reminders to hit your target easily.
Frequently asked questions
How is my water need calculated?
Base: 35ml per kg of body weight (research-backed for adults). Then adjusted up for exercise (extra 350-1000ml), hot climate (extra 350-1000ml), and pregnancy/breastfeeding.
Does coffee, tea, or juice count?
Yes, all fluids count toward hydration, including coffee (despite the diuretic myth), tea, milk, and juice. Water-rich foods like fruits and soups also contribute 20-30%.
Can I drink too much water?
Yes, but rare. Hyponatremia (low sodium from over-drinking) usually requires drinking many liters per hour. Follow thirst plus this target — do not force-drink beyond it.
Is this medical advice?
No, it is a general guide. People with kidney conditions, heart failure, or on certain medications should follow doctor's orders instead.
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