Does coffee and tea count toward daily water intake?

Yes, beverages like coffee, tea, milk, and juice contribute to your daily fluid intake. However, caffeinated drinks have a mild diuretic effect. Water-rich foods like fruits and vegetables also contribute significantly to your hydration levels.

What are the signs of dehydration?

Common dehydration signs include dark yellow urine, dry mouth, fatigue, headache, dizziness, and reduced urine frequency. Severe dehydration can cause rapid heartbeat and confusion. A simple check is urine color — pale yellow indicates good hydration.

Should I drink more water when exercising?

Yes. During exercise you lose water through sweat, which must be replaced. Drink 400–600 ml before exercise, 150–250 ml every 15–20 minutes during, and about 500 ml for every 0.5 kg of body weight lost afterward. In hot or humid conditions, increase these amounts.

Can you drink too much water?

Yes. Overhydration, or hyponatremia, occurs when excess water dilutes sodium in the blood. It is rare but can be dangerous, typically affecting endurance athletes who drink large amounts without electrolytes. Healthy adults do not need to worry as kidneys can handle up to 0.8–1 liter per hour.

Water Intake Calculator - Daily Hydration Needs by Weight & Activity

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Daily Water Intake Calculator

Find out how much water you should drink each day based on your weight, activity level, and climate conditions.

Unit System

Body Weight

lbs

Activity Level

Climate

Frequently Asked Questions

General guidelines suggest 2–3.5 liters per day for adults, but the ideal amount depends on your weight, activity level, climate, and overall health. A common rule is 35 ml per kg of body weight. This calculator gives a personalized estimate based on your inputs.

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