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Water Intake Calculator
Determine your daily water intake based on your weight.
How to Use
1
Enter your weight in kilograms.
2
Select your activity level.
3
Press "Calculate" to find your daily water intake.
Enter Data
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About This Tool
Why is Water Important?
Water is essential for all bodily functions. It makes up 60% of body weight and plays a vital role in digestion, temperature regulation, nutrient transport, and toxin removal. Even 2% dehydration can affect physical and mental performance.
How is the Amount Calculated?
Basic rule: Weight × 0.033 = daily liters. Then multiplied by an activity factor (1.0 for sedentary, 1.2 for moderate, 1.4 for active, 1.6 for very active). This is a general estimate; increase in hot weather or during illness.
Signs of Dehydration
- Thirst and dry mouth
- Dark or reduced urine
- Headache and fatigue
- Dizziness and difficulty concentrating
- Dry skin and lips
Hydration Tips
Start your day with a glass of water. Always carry a water bottle. Drink before, during, and after exercise. Add lemon or cucumber slices for natural flavor. Eat water-rich fruits and vegetables like watermelon and cucumber.
Did you know? Drinking a glass of cold water can boost your metabolic rate by 24-30% for 60-90 minutes. Drinking 500 ml before meals helps with weight loss by up to 44% more according to studies.
Sources & References
Frequently Asked Questions
It depends on your weight and activity. The general rule is 0.033 liters per kilogram. A 70kg person needs about 2.3 liters daily, increasing with physical activity.
Partially yes. Hot beverages contain water but caffeine is a diuretic. Most of your fluids should ideally come from pure water.
Yes, a rare condition called water intoxication (hyponatremia) can occur, but it is very rare. It happens when drinking very large amounts of water quickly, which dilutes sodium levels in the blood. Rule: don't drink more than 1 liter per hour, and spread your water intake throughout the day. The amounts calculated here are safe as a general guide.
Yes. Drink 150-250ml every 15-20 minutes during exercise. Choose a higher activity level in the calculator to reflect this.
Best times: a glass upon waking to activate the body, a glass 30 minutes before each meal to improve digestion, a glass before and after exercise, and a glass before bed. Spread water intake throughout the day rather than drinking large amounts at once.
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