Enter your age, gender, weight, height, weekly activity level, climate, and pregnancy/breastfeeding status into the Water Intake Calculator to find your personalized daily water intake in liters, ounces, and cups — plus your BMI as a bonus.
Daily Water Intake
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Daily Water Intake (Ounces)
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Daily Water Intake (Cups)
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Body Mass Index
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A general guideline is to drink 35ml per kilogram of body weight daily. However, this varies based on activity level, climate, age, and overall health. Our calculator considers these factors to give you a personalized recommendation.
Yes, coffee and tea do contribute to your fluid intake, though they have mild diuretic effects. About 80% of the fluid from caffeinated beverages counts toward your daily hydration needs.
Physical activity increases your water needs significantly. For every hour of exercise, you should drink an additional 500-750ml of water to replace fluids lost through sweat and increased breathing.
Yes, hot and humid climates increase your water needs by 10-15% due to increased sweating and fluid loss. Our calculator adjusts recommendations based on your climate conditions.
Older adults have reduced thirst sensation and kidney function, making proper hydration more challenging. Adults over 65 should pay extra attention to fluid intake and may need slightly more water per body weight.
Yes, pregnant women need an additional 300ml daily, while breastfeeding mothers need an extra 500-700ml per day to support milk production and maintain proper hydration.
Good hydration signs include pale yellow urine, urinating every 3-4 hours, moist lips and mouth, and good energy levels. Dark urine, fatigue, and headaches may indicate dehydration.
Yes, overhydration (water intoxication) is possible but rare. Drinking more than 3-4 liters per hour can dilute blood sodium levels. Spread your intake throughout the day for optimal hydration.