How much water should I drink per day?

A general guideline is to drink about 30–35 ml of water per kilogram of body weight. For a 70 kg person, that is approximately 2.1–2.5 liters per day. Adjust based on activity level, climate, and individual needs.

Can I drink too much water?

Yes, although rare, overhydration (hyponatremia) can occur when you drink excessive amounts of water, diluting sodium levels in your blood. This is most common during intense, prolonged exercise. Listen to your thirst and drink accordingly.

Do coffee and tea count toward my water intake?

Yes, coffee and tea contribute to your daily fluid intake. While caffeine has a mild diuretic effect, the water content of these beverages still counts toward hydration. However, water remains the best choice for hydration.

Water Intake Calculator

Calculate your recommended daily water intake.

Staying properly hydrated is vital for your health, energy levels, and overall well-being. Our free water intake calculator estimates how much water you should drink daily based on your body weight, activity level, and climate to help you stay optimally hydrated.

What Is a Water Intake Calculator?

A water intake calculator estimates your recommended daily water consumption based on personal factors like body weight, physical activity, and environmental conditions. While the general guideline of 8 glasses (about 2 liters) per day is popular, your actual needs may vary significantly.

Proper hydration supports digestion, nutrient absorption, joint lubrication, body temperature regulation, and organ function. Even mild dehydration can impact your energy, mood, and cognitive performance.

Factors That Affect Water Needs

Several factors influence how much water you need daily:

Body weight	Larger bodies require more water
Physical activity	Exercise increases water needs by 500–1000 ml/hour
Climate/temperature	Hot, humid weather increases perspiration
Diet	High-sodium and high-protein diets increase needs
Health conditions	Fever, vomiting, and diarrhea increase needs
Pregnancy/breastfeeding	Requires 300–700 ml additional daily

Signs of Dehydration

Recognizing early signs of dehydration helps you take action before it becomes serious. Common symptoms include thirst, dark yellow urine, dry mouth, fatigue, headaches, and dizziness.

A simple way to check hydration is the urine color test: pale yellow indicates good hydration, while dark yellow or amber suggests you need to drink more water.

Tips to Stay Hydrated

•Carry a reusable water bottle with you throughout the day
•Set reminders on your phone to drink water at regular intervals
•Drink a glass of water before each meal
•Eat water-rich foods like watermelon, cucumber, oranges, and strawberries
•Flavor your water with lemon, mint, or cucumber for variety
•Track your daily intake using our calculator or a hydration app

👉 Calculate your daily water intake now and stay properly hydrated!

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